<image>To understand the situation of noise pollution, the Environmental Protection Bureau of a certain city sampled the noise levels (in decibels) at 80 measurement points. After organizing the data, they divided it into five groups and drew a frequency distribution histogram, as shown in the figure. It is known that the frequencies of the first four groups from left to right are 0.15, 0.25, 0.3, and 0.2, respectively, and noise levels above 69.5 decibels will affect work and life. How many measurement points that affect work and life require management of the nearby area?

