need all parts please

Question 1 [50 points] Study the C++ program below and then answer the questions that follow. int a = 0; int b-0; int getVal (int c) //global variables 2 int n- 0; if(n, , For parts 1-4 assume that static scoping is being used. 1) [10] Which variables are in scope at line 6? Give the line number where each is declared. 2) [10] Which names are visible when line 23 executes? Give the line number where each is declared. 3) [10] Which variables are alive when line 15 executes? Give the line number where each is declared. 4) [20] Show the stack of symbol tables that is in effect when getVal is being translated