A three phase, 480V, 60Hz, 12-pole induction motor has the following parameters: R1 = 1.0Ω; R2’=0.5 Ω; Xeq = 10 Ω; Xc = 100Ω; Rc = 800 Ω; Calculate the following: i. Slip at maximum torque ii. Current at maximum torque iii. Speed at maximum torque iv. Maximum torque