Which of the following statements about annuities are true ? Check all that apply An annuity due is an annuity that makes a payment at the beginning of each period for a certain time period. An annuity due earns more interest than an ordinary annuity of equal time. Ordinary annuities make fixed payments at the beginning of each period for a certain time period. An annuity is a series of equal payments made at fixed intervals for a specified number of periods