Question $2(4$pts$)$: A $14-$cm diameter circular loop of wire is placed in a $1\mathrm{.}06-$T magnetic field.

a$)$ When the plane of the loop is perpendicular to the field lines, what is the magnetic flux

through the loop?

b$)$ The plane of the loop is rotated until it makes a $45$ angle with the field lines, what is the

magnetic flux through the loop at this angle?