I need help with this question please.

Draw timing diagrams for a NOR latch under the following circumstances: (a) S and R are high. S goes low, then R goes low. (b) S and R are high. R goes low, then S goes low. (c) S and R are high. S and R go low at the same time. (d) Based on these timing diagrams, explain why S = R = 1 is the forbidden state for a NOR latch