Find the measure of angle 1 if angle 2 measures 52 degree

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31

100 points, hi, i’m not sure how to get the equation from the graph and table.