(9 pts) Assume the gates in the circuit below have the following propagation delays Inverter: tpd-0.05 ns NAND gate: tpd 0.07 ns NOR gate: t 0.07 ns AND gate: tpd = 0.1 ns OR gate: tpd 0.1 ns a) What is the propagation delay of the path highlighted in blue (D->X) b) What is the propagation delay of the path highlighted in green ( )? (D-y) c) what is the propagation delay of the path highlighted in red ( )? (AX) Consider all possible paths through the circuit. Which is the longest? d) What is the critical path of the circuit? (This is the overall propagation delay, or the propagation delay of the path that takes the longest.)