Use the Frobenius inner product to compute ||A||, ||B||, and <A,B> for

A= (1, 2+i,3,i) (A is supposed to be a matrix so a_11=1, a_12=2+i, a_21=3,a_22=i)

and B=(1+i, 0, i,-i) (again B is supposed to be a matrix so b_11=1+i, b_12=0, b_21=i, b_22=-i)

I'm not familiar with Frobenius inner product, so im not sure how to do this problem.