Test data for the small Francis turbine shown in Fig. P11.48 are given in the table shown. The test was run at a constant 32.8-ft head just upstream of the turbine. The Prony brake on the turbine output shaft was adjusted to give various angula velocities, and the force on the brake arm, F. was recorded. Use the given data to plot curves of torque as a function of angular velocity and turbine efficiency as a function of angular velocity. LBrake arm Brake cord w (rpm)e n's) F (Ib) 0.129 2.63 1000 0.129 2.40 1500 0.129 2.22 1870 0.124 1.91 2170 0.118 1.49 2350 0.0942 0.876 2580 0.0766 0.337 2710 0.068 0.089 of