Question 5. [15 marks] The torque and the rpm of a double cylinder viscometer (Figure 4) are given to be 0.8 Nm and 300 rpm, respectively. It is worth mentioning that the inner cylinder is completely submerged in oil (Newtonian fluid) and the viscous effects on the two ends of the inner cylinder are negligible. The length of the two cylinders is equal to 75 cm and the outer diameter of the inner cylinder is 15 cm. a) [10 marks] Determine the viscosity of the fluid. b) 15 marks] Draw the behavior of the viscosity of this liquid (oil) as a function of temperature. 1 = 1 mm fluid Figure 4: Illustration of a double cylinder viscometer