(Solved): The SOP Boolean expression for the output f of a digital circuit with input signals a,b and c is: f ...

The SOP Boolean expression for the output $f$ of $a$ digital circuit with input signals $a,b$ and $c$ is: $f=a?b+a?c+b?c$ Using Boolean algebra identities, which of the following expressions can be used to build a circuit with output $f$ if we have only four 2-input gates? (Check all that apply) $a?b+(a+b)?c$ $a(c+b)+b?c$ $a?b+a?c+b?c$ b. $(a+c)+a.c$