(7) Consider a particle moving along a straight line whose position function is s(x) = 4t - t2, where s is in feet and t is in seconds. Find the average velocity of of the particle from t = 1 second to t = 3 second and the instantaneous velocity at t = 1 sec. (A) The average V1,3] A=0ft/s; the instantaneous velocity v(1)=z=1=2ft/s (B) The average V1,3] == 0ft/s; no instantaneous velocity for no change at t = 1s. (C) The average velocity V₁1,3] == 2 ft/s and v(1) = -1 = 0ft/s -1 = 2 ft/s (D) The average velocity V₁1,3] = A= v(1) = =

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