A) A four-variable logic function that is equal to 1 if any three or all four of its variables are equal to 1 is called a majority function. Design a minimum-cost SOP circuit that implements this majority function (show all work). B) Find the minimum cost SOP form of the function f(x1,x2,x3,x4,x5)=m(1,4,6,7,9,10,12,15,17,19,20,23,25,26,27,28,30,31)