1. Use the Quine-McCluskey minimization method to find a minimum cost SOP realization of the following functions:
(a) f(x1,x2,x3,x4)= fm(0,2,4,5,7,8,9,15)
(b) f(x1,x2,x3,x4)= fm(0,4,6,8,9,15) + d(3,7,11,13)
2. Design the simplest circuit that implements the function f(x1,x2,x3)= fm(1,3,4,6,7) using NAND gates only.