If V= I•R and P= V•I, write P in terms of R.

number of students (thanks sophia!) . 5; 8.

Step-by-step explanation:

Reading the graph, students who practice three or more hours include the last 2 bars (3-3:59) and (4-4:59), similarly fewer than two is the first two bars. And to find how many students just add the values of the bars. 4 plus 1 is 5 (three hours or more) and 3 plus 5 is 8 (two hours or less)