As I left home in the morning, I put on a light jacket because, although the temperature was dropping, it seemed that the temperature would not go much lower. But I was wrong. Around noon a northerly wind blew up and the temperature began to drop faster and faster. The worst was around 8 pm when, fortunately, the temperature started going back up. Let t=0 hours at 8 am. (a) When was there a critical point in the graph of temperature as a function of time? there was a critical point at t = hours after 8 am (b) when was there an inflection point in the graph of tempature as a function of time?

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