Answer:
a

b

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

=>
=>
See the attached image! Thanks!
Is a system of two objects in space which are so close that their gravitational interaction causes them to orbit about a common center of mass.