A particle moves along a straight line so that its velocity at time t seconds is given by v(t)=5te5t2 metres per second.
a. (a) Find the displacement of the particle from t=1s to t=3s.
b. (b) Suppose instead the velocity were v(t)=ktekt2 with k>0. Obtain a general expression for the displacement between t=a and t=b seconds in terms of k, a, and b.