Programming in Objective C language

Write a program that will accepts a students record from keyboard and displays it on the screen. The input will be students name, test1, test2, quiz, lab, and final. The program will compute total score and display it. The total score will be calculated using following weights:

test1 and test2 each 20%

lab & quiz each 15%

final 30%

Compute letter grade of total score based of the following;

Total >=90 A

80 <=Total<90 B

70<=Total<80 C

60<=Total<70 D

Total <60 F