3. A rotational viscometer contains a fluid that gives a dial reading of 25 at a rotor speed of 300 rpm. a. What would be the dial reading of the viscometer at a rotor speed of 500 rpm, if this fluid is a Newtonian fluid? (2 pts) b. What would be the dial reading of viscometer with rotor speed of 600 rpm, if this fluid is a Bingham plastic fluid with a yield point of 5 lb/100ft². (3pts) c. Using the same yield point value as part b, calculate the fluid plastic viscosity and apparent viscosity at 200 rpm, both in cp units. (5 pts)