Problems for the basic concepts of Induction motor(IM) taking care of slip and syncronous speed and motor speed and its relationship

A 50 Hz induction motor operates in such a way that the slip is 1.45.
(a) is this motoring, generating or braking? Explain
(b) If the synchronous speed is 900 rpm, find the mechanical speed.
(c) Find the number of poles.
(d) Find the frequency of the rotor currents.
(e) Find the speed of rotation of the magnetic field in the air gap with respect to the
rotor.