Given below are two statements:
Statement 1: When TU is constant is indicates that MU has becomes zero. 
Statement 2: When TU starts falling that means now MU has become positive.
Which statement/s are correct?

Statement 1 is true and Statement 2 is false

When MU has become zero, it indicates that TU has reached it maximum. Whereas, consumption beyond the saturation point causes TU to fall as MU becomes negative.