K. Consider the following skeletal C-like program: void funi (void); /* prototype */ void fun2 (void); /* prototype */ void fun 3 (void); /* prototype */ void main() { int a, b, c;. } void funi (void) b, c, di { int } void int { fun2 (void) c, d, e; } void int { fun 3 (void) d, e, f; } Given the following calling sequences and assuming that static scoping is used, what variables are visible during execution of the last function called? Include with each visible variable the name of the function in which it was defined. (10 points) main calls fun3; fun3 calls fun2; fun2 calls funi