a$)(2$ pts$)$ Derive the outputs F$1$ and F$2$ as Boolean functions of the four inputs A$,$ B$,$ C and D$,$ as implemented in the circuit.

b$)(2$ pts$)$ List the truth table for the four input variables. Then determine and list the binary values for T$1$ through T$4$ and outputs F$1$ and F$2$ in the table.