Referring to the CUMULATIVE probability distribution chart below, what is the approximate probability that a randomly chosen student $($who is part of the population reflected in the chart$)$ will have height in the range of $68$ inches to $71$ inches $($both endpoints included, meaning the height should be either $68,69,70,$ or $71$ inches$).$

$$FIGURE $2$: Cumulative probability distribution for student heights,$$ which displays the increasing likelihood of a student being less than or equal to various heights