After reading the background, please work on the following problem: a. The source process reads information from a file (Therefore, you need to prepare a small text file for testing purpose). b. The source process calls fork() to create the filter process. c. The filter process reads information from the source process (passed via an anonymous pipe), converts the uppercase characters to lowercase ones and vice versa, and then prints out the converted characters to the screen.

Answer:

Explanation:

The following code is written in Java. It has the main method (source process) and a function called fork() which contains the filter process as described in the question. fork() takes in the file information as a parameter and prints out the information to the screen. The test can be seen with the output in the attached image below.

import java.io.File;

import java.io.FileNotFoundException;

import java.util.Scanner;

class Brainly {

   public static void main(String[] args) {

       String data = "";

       try {

           File myObj = new File("C:\\Users\\Gabriel2\\AppData\\Roaming\\JetBrains\\IdeaIC2020.2\\scratches\\input.txt"); //USE YOUR FILE LOCATION

           Scanner myReader = new Scanner(myObj);

           while (myReader.hasNextLine()) {

               data += myReader.nextLine();

               data += "\n";

           }

           myReader.close();

       } catch (FileNotFoundException e) {

           System.out.println("An error occurred.");

           e.printStackTrace();

       }

       System.out.println("Original: \n" + data);

       fork(data);

   }

   public static void fork(String data) {

       String output = "";

       for (int i = 0; i < data.length(); i++) {

           if (Character.isUpperCase(data.charAt(i)) == true) {

               output += Character.toLowerCase(data.charAt(i));

           } else if (Character.isLowerCase(data.charAt(i)) == true) {

               output += Character.toUpperCase(data.charAt(i));

           } else {

               output += data.charAt(i);

           }

       }

       System.out.println("Modified: \n" + output );

   }

}

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2. If the workbook opens in Protected View, click the Enable Editing button in the Message Bar at the top of the workbook so you can modify the workbook.
3. Use Consolidate to create a summary of real estate sales for all property types. Place the consolidated data on the Summary worksheet in cells B3: C15. Use the Average function to consolidate the data from cells B2: C14 in the Condo, Townhouse, and Single Family worksheets. Include links to the source data.
4. Import individual sales data from the tab-delimited text file Select Sales Data 2019-2020. Import the data as a table in cell A1 of the Select Sales worksheet.
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6. In the Select Sales worksheet, add data validation to restrict values in the House Type columns (cells B2: B139) to the values in the cell range named PropertyTypes. Include a drop-down list of values in the cells to assist in data correction.
7. Add the following input message to cells B2:B139: Select a property type from the list.
8. Add the following error alert to cells B2:B139: Not a valid property type.
9. Apply data validation circles to any values that violate the data validation rules you just created.
10. Add a comment to cell B1 in the Select Sales worksheet that reads: This needs to be fixed.
11. Add a hyperlink from cell B1 in the Select Sales worksheet to link to the named range (defined name) PropertyTypes. Test the link.
12. Use Flash Fill to add a new column of data to the Select Sales worksheet to display the number of bedrooms/the number of bathrooms.
a. In the Select Sales worksheet, cell F1, type the heading: BR/BA
b. Complete the column of data using this pattern in cell F2: 1 BR/1 BA
You will need to enter at least two samples in order for Flash Fill to suggest the correct autofill data. Check your work carefully.
Sales Summary 2019-2020
Number of Sales Average Selling Price
1
2
3 One BR, One BA
4 One BR, Two BA +
5 Two BR, One BA
6 Two BR, Two BA
7 Two BR, Two BA +
8 Three BR, One BA
9 Three BR, Two BA
10 Three BR, Three BA +
11 Four BR, One BA
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13 Four BR, Three BA+
14 Five BR-. One BA
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16
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