5- Given following graph: 2 3 4 5 a- Find out the adjacent Matrix for the above graph b- Find out the adjacent lists for the above graph. 6- Evaluate the following statement using stack : Z = sum (1,3); Where sum defined as follows: int sum (int x , int y) int m; if(x==y) return 2*x; else m=(x + y)/2; return sum ( x, m) + sum (m+1,y); } }