Design a combinational circuit that accepts a $4-$bit number and generates a $3-$bit binary number output that approximates the square root of the number. For example, if the square root is $3\mathrm{.}5$ or larger, give a result of $4.$ If the square root is $<3\mathrm{.}5$ and $>=2\mathrm{.}5,$ give a result of $3.$

Implement the function using $4-$to$-16$ Decoder $$ e$.$g$.,74154(74$XX$154)$