Answer
(a) $100 \%$
(b) $144.141 \%$
(c) $171.457 \%$
Work Step by Step
(a) The effective annual rate for an account paying $100 \%$ compounded annually is $100 \%$
(b) The interest rate per quarter is $100 / 4$. Therefore, the effective interest rate is
$$i= \left(1+\frac{100}{4}\right)^{4}-1= 144.141\%$$
(c) The interest rate per day is $100/ 365$. Therefore, the effective interest rate is
$$i= \left(1+\frac{100}{365}\right)^{365}-1= 171.457 \%$$
