Design b$)$: You are required to use only $4-$to$-1$ multiplexers. Only the inputs signals, zeros, and ones, $\backslash (\backslash$mathrm$\{$a$\},\backslash$mathrm$\{$b$\}\backslash ),\backslash (\backslash$mathrm$\{$c$\},\backslash$mathrm$\{$d$\},0,1\backslash ),$ are allowed at the inputs to the multiplexers. Logic functions $($other than a$,$ b$,$ c$,$ d$,0,1)$ are not allowed. Multiple $4-$to$-1$ multiplexers are permitted. Please draw the schematic.