1. Implement the following truth table, with inputs ABCD and with output X, using an 8:1 multiplexer. Assume that inputs ABC are to be used for selection. Please show work.

A       B      C      D      X      
0       0      0      0/     0      
0       0      0      1/     0      
0       0      1      0/     0      
0       0      1      1/     0      
0       1      0      0/     0      
0       1      0      1/     0      
0       1      1      0/     0      
0       1      1      1/     1      
1       0      0      0/     0      
1       0      0      1/     0      
1       0      1      0/     1      
1       0      1      1/     1      
1       1      0      0/     0      
1       1      0      1/     1      
1       1      1      0/     1      
1       1      1      1/     1