Consider the following skeletal C function:

(Note: Code blocks and loop conditionals are not relevant to the problem, and so are indicated by ellipses as placeholders.)

void fun(void) {

int a, b, q; // definition 1

while () {

int b, c, d; // definition 2

// < - - - - - - - point 1

while () {

int c, d, e; // definition 3

// < - - - - - - point 2

}

// < - - - - - - - point 3

}

// < - - - - - - - - point 4

}

For each of the four marked points in this function, list each visible variable, along with the number of the definition statement that defines it.

Point 1 Point 2 Point 3 Point 4

variable defined variable defined variable defined variable defined