Subject = digital logic

Please show in detail all the steps required to understand the concept.

I will drop a like

1(a) Explain about the use of digital system. 5 (b) Use 'quick method' for the Conversions: 2 (i) (ABCD)16=(?)2 (ii) 3338=(?)2 (c) Convert: (1010100)excess3code=(?)10 (10101)2=(?)8 (d) 'Use 2's complement method to perform 58+(32). 5