3, Reads a real number and outputs its inverse. If O is read, writes a warning message and quit. Sample program: #include int main float a; printf("Enter a number = ");scanf("%f ", &a); if (a --e.0) printf("You entered e. "); else printf("You entered a number other than e. ") ; return a ; 4. Reads a real number, X, and outputs its sine, ie. sin x. You need to use math.h and the -lm compile option. Sample program: #include #include Kmath.h> int main() float x ; printf("Enter a number -"); scanf("%f", &x); printf("x- %f exp(x) =%f ",x, exp(x)). return 8; Sample run (note the -Im option): $ gcc -lm my program. $ a.out