The following sketch represents the speed v (in miles per hour) of Michael’s car as a func...

The following sketch represents the speed v (in miles per hour) of Michael’s car as a function of time t (in minutes).

(a) Over what interval of time was Michael travelling fastest?

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(b) Over what interval(s) of time was Michael’s speed zero?

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(c) What was Michael’s speed between 0 and 2 minutes?

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(d) What was Michael’s speed between 4.2 and 6 minutes?

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(e) What was Michael’s speed between 7 and 7.4 minutes?

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(f) When was Michael’s speed constant?