1. In studying the motion of a string, it is determined that the speed of the various points along the string is given by the function v(s, t,m) = 2a + 3t+4ys +6+2 km where s is the coordinate of points along the string, t is time, and a, 6, y, 8, and are constants. What are the dimensions of a, 6, y, 8?