simplify Boolean expression to minimum literal

Question

(xy + z) + z + xy + wz to three literals (morris mano 2.4b )

Answer 1

( X Y+ Z) + Z + X Y + W Z

= X Y+ Z + Z + X Y + W Z

= X Y + X Y + Z+ Z + W Z

= X Y + Z +W Z

= X Y + Z (1+W)

= XY + Z