Answer:
a

b

Step-by-step explanation:
From the question we are told that
The dimensions of the rectangular coil is 5.40 cm ✕ 8.50 cm = 0.054 m X 0.085 m
The number of turns is

The current it is carrying is

The magnetic field is

Generally the magnitude of the magnetic dipole moment is mathematically represented as

Here A is the area which is mathematically represented as

=>

So

=>

Generally the magnitude of the torque acting on the loop is mathematically represented as

=>

=>
