P. 144 PE 3: Determine the purpose of the program given below. Then rewrite each program using #define statements for appropriate literals. #include int main() { float fahren, celsius; printf(" Enter a temperature in degrees Fahrenheit: "); scanf("%f", &fahren); celsius (5.0/9.0) * (fahren = 32.0); printf(" The equivalent Celsius temperature is %f", celsius); return 0; }