A 4-pole, 50 Hz, 3-phase induction motor with a rotor resistance of 0.25 Ω develops a maximum torque of 25 N.m at 1400 rpm. The rotor reactance x_{2} and slip at maximum torque s_{max,T} respectively would be

1. \(2.0\;and\frac{1}{{15}}\)

2. \(3.75\;and\frac{1}{{12}}\)

3. \(2.0\;and\frac{1}{{12}}\)

4. \(3.75\;and\frac{1}{{15}}\)