1. Write a C++ program to implement this task. (50 pts) Percentage marks attained by a student in three exams are to be entered into a computer, using the keyboard. An indication of Pass or Fail is given out after the three marks are entered. The criteria for passing are as follows: if all three examinations are passed. Additionally a student may pass if only one subject is failed and the overall average is greater than or equal to 50. The pass mark for an individual subject is 40. Make use of a named constant for defining the pass mark of 40