b. [O #include main () { float cpg, payment, credit=13.5; printf ("Please Enter your GPA: "); scanf("%4f", &gpc); if (gpa==4.00) payment=8500; else payment=credit*1900+8500; printf ("Payment: %.3f", payment); } Read the above program carefully and answer the following: I) Purpose of the program II) Variable with their type III) Input and Output statements