I have a problem in solving these C++ Program. The binomial expression can be expanded as follows If n=2 a2+2ab+b2 N=3 A3+3a2b+3ab2+b3 1 1 2 1 1 3 3 1 The coefficients will be gotten using the combination ncm and its refered to as the pascal triangle Such that if n=4 then; 4c0 4!/(4-0)!0!=1 4c1 4!/(4-1)!1!=4 4c2 4!/(4-2)!2!=6 1. write a function to compute the combinations 2. implement it in c++ program to output the pascal triangle for a number n.