Concept:Convert a nominal rate compounded quarterly to an effective annual rate.Explanation:The effective annual rate (EAR) formula is: EAR=(1+nr)n−1 where r=5%=0.05 and n=4 (quarterly compounding).Compute step by step: 40.05=0.01251+0.0125=1.0125(1.0125)4≈1.050945EAR=1.050945−1=0.050945=5.0945% Rounded to one decimal place, 5.0945%≈5.1%.Answer:5.1%