F(x1, x2, x3) = Product M(3, 4, 6, 7) Find simplified POS (Product of Sum) expression (and circuit) for the following output function F(x1, x2, x3) = Product M(0, 2, 5) Prove that sigma m(1, 2, 3, 4, 5, 6, 7) = x1 + x2 + x3 Design simplest (lowest-cost) circuit of four variables (x1, x2, x3, x4) which produces an output value of f=1 when two or more variables have the value of 'O': otherwise f = 1: Calculate cost of your final lowest-cost circuit that you design