A lightweight diving board is supported by two pillars. One is at the end of the board and the other is 1.30 m away. A 75-kg person is standing on the board at such a location that the pillar at the end (pillar #1) of the board exerts a 850-N force downward. Determine the following.(a) distance the person is standing from the end pillar (pillar #1)(b) magnitude of the upward force exerted by the second pillar (pillar #2)

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)