CSBP112: Introduction to Programming LAB #2 Name: ID: bjectives e objective of this lab: To become familiar with the basic components of a C++ program, inc identifiers, data types, arithmetic operators. . To edit, compile, run, and test your application. cercise #1: Redo your homework 1 to complete the following: a) Make sure cin is used for input. b) Change to file input ("input.txt") and file output ("output.txt"). cercise #2: Write a program to do: a) Prompts the user to input three test grades. Each grade is an integer nur b) Prints the three grades one per line in reverse order of input and labeled Testi, Test2, and Test3. c) Finds the sum of the three tests and their average. d) Prints the sum and average of the three tests. ample input/output: (The average is supposed to be actually 74.33, so why di ow to fix it to get an accurate average resulta) Enter three grades: 69 73 The grades that you entered are: Test3: 81 Test2: 73 Test1: 69 The sum of the grades is: 223 The average grade is: 74 omework #2: Redo the above Exercise 2 to read the test info (a) from a file est.txt". Then output the results (b) to a file "grade.txt