Do all you can in one big day that you have time off or work on one thing then work on the other at the same time
The average distance between the variable scores and the mean in a set of data is the standard deviation.
The wave property which is independent of all other properties is THE VELOCITY OF A WAVE.
The velocity of a wave is defined as the distance moved by a cyclic motion per unit time. The velocity of a wave is determined by the properties of the medium through which it moves; it does not not depend on the properties of the wave itself.
Inversion will be your answer
