A coil has 250 turns enclosing an area of 101cm2 what is

Question

Compute the given parts of following question:

Question: A coil has 250 turns enclosing an area of 10.1cm². In a physics laboratory experiment, the coil is rotated during the time interval 3.90 x 10² s from a position in which the plane of each turn is perpendicular to Earth's magnetic field to one in which the plane of each turn is parallel to the field. The magnitude of Earth's magnetic field at the lab location is 5.40 x 105 T.

Question I: What is the magnitude of the magnetic flux through the coil before it is rotated?

Question II: What is the magnitude of the total magnetic flux through the coil after it is rotated?

Question III: What is the magnitude of the average emf induced in the coil?

Please show how you get the answer.