<image>【Question】 A company has set the following regulations for outdoor workers during the summer: When the temperature exceeds 35°C, outdoor continuous working time is strictly prohibited to exceed 100 minutes; for working periods no less than 60 minutes, the company provides appropriate subsidies. A random sample of workers was surveyed for their continuous working time outdoors during high temperatures (in minutes), and the resulting data was drawn into a frequency distribution histogram (as shown in the figure), where the working time range is [0,100], and the sample data is grouped into [0,20), [20,40), [40,60), [60,80), [80,100].
(1) Find the value of x in the frequency distribution histogram;
(2) Estimate the median of the sample data from the frequency distribution histogram;
(3) Using the frequency distribution of this sample to estimate the overall distribution, treating the frequency as probability; using stratified sampling, if 25 people are to be selected from those receiving subsidies and those not receiving subsidies to check changes in their health status, how many people should be selected from each group?
