3. You are in a boat 2 miles from the nearest point on the coast. You are to go to point 2. → down the coast and 1 mile inland (see figure). You can row at a rate of 2 miles per hour and you can walk at a rate of 4 miles per hour. Let T be the time it takes you to reach point Q. Express 7' as a function of x. dr de b) Verify that x-1 is a critical number of 7. has a local minimum at x 1. a) b) Find

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