Answer:
Nominal: 6,60%
Periodic: 1,65% quaterly
Effective interes rate = 6,77%
Step-by-step explanation:
The interest rate that give at the begining of the excersie is nominal 6.60% , now you have to calculate the others interest rates according with the inofmration of the coumponded period quaterly
Periodic interest rate = (6,60%/4) = 1,65% quaterly
Effective interes rate = ((1+quaterly periodic interest rate) ^(4)) -1
Effective interes rate = ((1+1,65%) ^(4))-1
Effective interes rate = 6,77%