Question $1$: Evaluate the following program written in C language.

char key $[8]="1122"$;

char name $[8]=$ "secure";

char pwd $[8]$;

gets$($pwd$)$;

$pr{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}f(key)$;

$pr{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}f(name)$;

$pr{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}f(pwd)$;

$pr{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}f(key+8)$;

a$.$ What would be the output of above program if the entered password is $1010.$ Provide explanation for each line.

b$.$ Identify the vulnerability in this code. Provide an input value that changes the value of key without changing the value of name.

c$.$ How can we correct this code?