A nurse measured the blood pressure of each person who visited her clinic. Following is a? relative-frequency histogram for the systolic blood pressure readings for those people aged between 25 and 40. Use the histogram to answer the question. The blood pressure readings were given to the nearest whole number. Identify the midpoint of the third class.

O 0.35- 0.30 0.25- 0.20 Relative Frequency 0.15 0.10 0.05 0.00 100 110 120 130 140 150 160 Systolic Blood Pressure (mm Hg)