Code:#include <stdio.h>int Sum(); double ArcLength(); int main() { int result1, result2; double s; result1 = Sum(); result2 = Sum(); s = ArcLength(); printf("First sum = %d, Second sum = %d\n", result1, result2); printf("Arclength = %lf meters", s); } int Sum() { int a, b, c; printf("Enter a value for a: "); scanf("%d", &a); printf("Enter a value for b: "); scanf("%d", &b); printf("Enter a value for c: "); scanf("%d", &c); //printf("The sum of a, b, and c is: %d\n", a + b + c); return a + b + c; } double ArcLength() { double r, AngleR, AngleD; char choice; printf("Input radius in meters for circle: "); scanf("%lf", &r); printf("Do you have an angle value in radians? (Y or N): "); scanf(" %c", &choice); if (choice == 'n' || 'N') { printf("Enter an angle in degrees: "); scanf("%lf", &AngleD); printf("Your angle in radians is %lf\n", AngleD*0.017444); printf("Input an angle in radians: "); scanf("%lf", &AngleR); } else if(choice == 'y' || 'Y') { printf("Input an angle in radians: "); scanf("%lf", &AngleR); } return r * AngleR; }