I know final values from logisim but I need to knwo the steps

DNS:

Z=~B ~D + C D + B ~C

y=~A ~B ~C ~D + ~A ~B C D + B ~C D + B C ~D + A ~C D + A C ~D

CNS:

z=(B + C + ~D) (~B + ~C + D)

y=(A + B + C + ~D) (A + B + ~C + D) (~B + C + D) (~B + ~C + ~D) (~A + C + D) (~A + ~C + ~D)