Stored energy due to the interactions between objects

Can anybody me with this? ? (picture included.)

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

This is really important 1.which of the following prefixes represents the largest value? (2 points)gigahectorkilomilli2.which of the following types of graphs is best for plotting the mean, median, and mode of data? (2 points)bar graphbox-and-whiskercircle graphstem-and-leaf