An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting poisition in a time t2.

(a) If she is swimming initially in the positive x-direction, determine her average velocities symbolically in

(a) the first half of the swim,

(b) the second half of the swim, and

(c) the round trip.

(Use any variable or symbol stated above as necessary.) first half second half round trip (b) What is her average speed for the round trip? average speed = m/s

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