(1) A pension equal to the annuity which would have been allowable at age of retirement if such teacher had been a member of this retirement system and had made contributions of 5 percent of his or her earnable compensation payable from state funds, but not to exceed an annuity allowable at age 65, computed on the basis of such contributions as would have been made prior to age 65; and
(2) If he or she has a prior service certificate in full force and effect, an additional pension equal to the annuity which would have been provided at age of retirement, but not to exceed an annuity which would have been provided at age 65 by three times the amount of his or her prior service accumulations as heretofore defined, with regular interest thereon from time to time in effect from the date of establishment until the date of his or her retirement, but not beyond age 65.