7.21 c help

(a) Riv, x, y, z)-(x + y, + z)(x' + y + z)w (b) Fla, b. c, d) m(4.5, 8,9, 13) 7.19 Implement x, y,a)m(0. 1.3,4,7) as a two-level gate circuit, using a minimum number of gates. (a) Use AND gates and NAND gates (b) Use NAND gates only Implement Ra, b, c, d) - 2 minimum number of gates (a) Use OR gates and NOR gates (b) Use NOR gates only 7.20 m(3, 4. 5,6,7, 11, 15) as a two-level gate circuit, using a 7.21 Realize each of the following functions as a minimum two-level NAND-gate circuit and as a minimum two-level NOR-gate circuit. (a) F(A,B,C,D) BD, + 'CD + A, BC + A'BC'D + B'D' (b) f(a, b, c, d) 11 M(0, 1.7.9, l0.13) . D(2,6, 14, 15) (c) la, b, c, d) -I m(0,2,5. 10) + I d(3, 6, 9, 13, 14, 15) (d) FIA. B, C. D, E)-m(0.2, 4,5, 11, 14, 16, 17, 18, 22, 23, 25, 26, 31) +2 d(3, 19,20. 27, 28)