Please answer! thank you so much!

()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

Plot the intercepts to graph the equation

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates