$($a$)(4$ marks$)$ What circuit is the diagram shown at the right? In your answer, specify whether it is synchronous or asynchronous, the number of bits, the specific name of the module, and any other information you consider relevant.

$($b$)(2$ marks$)$ Why is it synchronous$/$asynchronous$?$ Point out the feature that makes you think so$.$

$($c$)(6$ marks$)$ If you consider the circuit synchronous, draw the circuit of its $2-$bit asynchronous counterpart using D flip$-$flops. If you consider the circuit asynchronous, draw the circuit of its $2-$bit synchronous counterpart using D flip$-$flops. Your circuit should have the Enable function, where the outputs would not change when Enable is logic $0.$ The D flip$-$flops used should have Set and Reset connections like those in the circuit on the right, which should be connected properly.

End of assignment $-$