discret math

Q#1: Give a big-O estimate for each of these functions. For the function g in your estimate f (x) is O(g(x)), use a simple function g of smallest order. a. (n? -9"+2n? log n)(n+3" +log n+1) + (n!+ 4"3 log n+20) n +2) b. (n"+ n2" + 5" nl+5") (n! + 2)(n+log(n+ 1))