Finding loop current with time-varying magnetic field B_z=at²-b

[Lance WIlliam]

Homework Statement

A conducting loop with area 0.13m^2 and resistance 5.0 ohms lies in the x-y plane. A spatially uniform magnetic field points in the z direction. The fields varies with time according to B_z_=at^2 - b, what a=2.4 T/s^2 and b=8.2 T

Find the loop current t=1.5s

I= A

Homework Equations

Im looking for I and I am given a R so I know I use I=emf/ R
Im guessing my 1st step is to find "emf" but there lies my problem...how should I go about it?
Thankyou.

The Attempt at a Solution

 

[Defennder]

Just apply Faraday's law. Now of course the question is how exactly do you apply it? Note that magnetic flux through a conducting loop changes if either the strength or direction of the field varies with time.