Construct a 16-to-1 line multiplexer with two 8-to-1 line multiplexers and one 2-to-1 line multiplexer?

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please help me regarding above question.any help would be appreciated. Thanks in advance.

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Balaji Kulkarni On

Say the select lines are S3 S2 S1 S0 , use txo 8x1 mux and use S2 S1 S0 as select lines for both of them , now connect the output of two mux to another 2x1 mux with upper 8x1 mux output as 1st input and next one as second input , now use remaining select line (S3) as select line for 2x1 mux , take the output from it..