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4. The following data shows the number of days of water state(polluted or not polluted) according to the season in a year: Season Wet Monsoon 142 140 8 10 Dry 53 12 Not Polluted Polluted (a) Does the state of water and season independent at significance level a = 0.05?. (b) It is known that there are 65 days of dry season, 150 days of Wet season and 150 days of Monsoon season in a year. In this case, state the correct hypothesis and conclude at significance level a = 0.05