please show each step and explain

Derive the minimized sum-of-products forms for the following functions. You may use a combination of truth tables and applications of the laws of Boolean algebra, but be sure to show your work. You will get no credit for just writing down the final answers. 1. f(A, B, C, D) = (A + B+C).(A + D).(A + C) 2. f(W, X, Y, Z) = (W.Y + W.Z).(X+Y).(X + Z)