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2. 2. #include Considering the code on the right, answer the following questions. a. The code produces some compiler errors. Why? b. Modify the code so that it is compiled correctly indicate the modifications). c. What will be the value of index at the end of main (i.e. after calling the function eval)? d. Functions scanf and printf are not defined in the code on the right. Will this produce a compilation/linking error? Why or why not? int main() { char pot="$', index; while (index! pot) { scanf("%c", index); eval (index); } 9 void eval(char a) bra-'a'; printf ("Code of 8c is %d", a,b) return b; } 3. Regarding the code in the box answer the following questions: #include int main() { int k, i=1; a. How many times will the while loop be executed? Explain. 5 while (i