When the current in loop 1 is I1 = 0.75 A, the magnetic flux through loop 2

Question:

When the current in loop 1 is I1 = 0.75 A, the magnetic flux through loop 2 is 2.35 × 10−8 T·m2. What is the mutual inductance of the two loops?
The current I1 in loop 1 is supplied by an external source (not shown) and is clockwise as viewed from the right.