please I need help to solve all the questions thank you

1. Design a 4 to 16 (1-of-16) decoder [4 inputs DCBA given and 16 outputs Ois 74'138 decoders only (No extra gates). Label all ou s to Oo] using two ctl Es E2 E A0 A1 A2 A0 Al A2 74'138 3 to 8 74'138 3 to 8 ow how a 16-input multiplexer is used to generate the function DC'B'A' D'C'BADC B'A DC'BA +DCB'A. Show connection of DCBA 2. Sh S3 S2 sO