Please help me with 3.1.1, I'm kinda lost

Study and run the following program to understand how it works and, in particular, how the various functions are related to each other. Draw a caling graph to clearly sh the retuned value, if applicable. include 3.1.1. int fl(int); /function declaration void f2(int) void f3(void); char f4(int); int main0 1 //printf("Hello. Welcome! n My name is printf"calling f10 .. n"); int fiResult f(23) printf"fl Result-%d ", fResult); f30: n) ) //main0 int fl(int data) { printf" in f10: data-%d ", data); data- data /5; f2(data); return data; void f2( int data) { printf"in 20: data is %dn", data); char f2Char f4(55); printf"f2Char. %c ".DChar); //f20 void f30 //f30 char f4 (int x) { printf Bye.n"); printf("in f40: x is %din'', x); return X; f4