Answer:
EAR = (1 + APR/m)^m - 1. Where m = compounding periods
First National Bank
11.4 percent compounded monthly on its business loans
EAR = (1+11.4%/12)^12 - 1
EAR = (1.0095)^12 - 1
EAR = 1.12014921627 - 1
EAR = 0.12014921627
EAR = 12.014921627%
EAR = 12.01%
First United Bank
11.6 percent compounded semiannually
EAR = (1+11.6%/2)^2 - 1
EAR = (1.058)^2 - 1
EAR = 1.119364 - 1
EAR = 0.119364
EAR = 11.9364%
EAR = 11.94%