A particle moves on a horizontal line so that its position, in centimeters, at time t, in seconds, is given by s(t) = t - 18t + 60t - 1, with t > 0. Assuming that the positive direction is to the right: A. Determine the velocity function, v(t) . v(t ) = Evaluate v(5) . v(5) = Interpret, with a complete sentence and appropriate units, the meaning of v(5) and its value. B. Determine the t -interval (s) when the particle is moving to the right