1. (Variable Type) It is very important to use the correct type (int, float, char, double) for each variable defined/declared. If you mix different types of variables, the precedence is double > float > int=char. Compose the following program and run it. Discuss (a) the result (why it did not work as expected) and (b) how you can modify the code so that it prints the expected value. #include int main() int a-10, b=20; float c; c=a/b; printf ("Answer = %f ", c); return 0; 2. (If statement) The syntax of the if statement is: if (.....) {statement 1; statement 2; statement 3; } else statement4; Note that if you want to execute multiple statements after if you have to enclose them by { and } else is optional above. Write a program to tell whether an integer entered from the keyboard is an even number or an odd number. Use the following as a template: #include int main() int a; printf ("Enter an integer ="); scanf("%d", &a); if (aX3==0) printf("The number you entered is a multiple of 3. "); else printf("The number you entered is NOT a multiple of 3. "); return 0; Note: afm returns the remainder of a divided by m. 4. It is possible to approximate the sum of an infinite series by using the for statement. The following code computes which converges to 2. (proof). (mathjoke). Here is a code to do the above. #include #include int main() int i, n; float sum=0; printf("Enter # of terms ="); scanf("%d", &n); for (i=0; i