1. Change the program at the bottom so that it prints to the output "Hello, World!". 1 #include 2 3 int main() { 4 5 6} 2. Complete the following sketch to prints out the sum of the numbers a, b, and c 1 #include 1234SGT68 2 printf ("Goodbye, World!"); return 0; 3 int main() { int a = 3; 4 5 7 8 float b= 4.5; double c = 5.25; float sum; 9 /* Your code goes here / 10 11 printf("The sum of a, b, and c is f.", sum); 12 return 0;