(a) Write a program which calculates and displays the obtained marks, percentage in six subjects and assigns grades based on percentage obtained by a student. i. if the percentage is above 90, assign grade A
ii. if the percentage is above 75, assign grade B+
iii. if the percentage is above 70, assign grade B
iv. if the percentage is above 65, assign grade C+
v. if the percentage is above 60, assign grade C
vi. if the percentage is above 55, assign grade D+
vii. if the percentage is less than 50, assign grade F
(Hint: using logical operators)
c++ programming

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