<image>To understand the situation of noise pollution, the city's Environmental Protection Bureau conducted a sample survey of the noise levels (unit: decibel) at 80 measurement points and organized them into five groups. A frequency distribution histogram was drawn 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. Given that noise levels above 69.5 decibels will affect work and life, how many measurement points require treatment in the nearby area due to the impact on work and life?