(1 point) The position of a particle moving along the x-axis is given by s(t) = 8t + 6. Use difference quotients to find the velocity v(t) and acceleration a(t), filling in the following expressions as you do so: U(t) = lim [ 6t + 0 /h] = 6t h-0 a(t) = lim [ dv(t)/dt /h] = 6 h-0