1. Find all prime implicants of the following multiple output function and give the
prime implicant table.
F1(w,x,y,z) = \sum (2,3,5,7,8,9,10,11) + \sum_{\phi}(4,6,15)
F2(w,x,y,z) = \sum (2,4,5,6,7,10,11) + \sum_{\phi}(8,14,15)
F3(w,x,y,z) = \sum (2,6,7,8,13,15) + \sum_{\phi}(4,9,14)