A certain 4 input gate called LEMON gate realizes the switching function
LEMON(A,B,C,D) = BC(A+D)
Assuming that the input variables are available in both primed and unprimed
form:
i. show a realization of the function f(w,x,y,z)= P(0,1,6,9,10,11,14,15) with
only three LEMON gates and one OR gate.