(a) For purposes of determining eligibility for benefits for part-time employees under sections 5-192 l , 5-192m , 5-192o and 5-192p , a member's part-time service shall be treated as full-time service.
(b) For purposes of computing the retirement benefit payable to a member whose service consists solely of part-time service without variation in the number of hours worked during all periods of his state service, such member's service shall be treated as full-time service.
(c) For purposes of computing the retirement benefit payable to a member whose service consists of part-time and full-time service or whose service consists of part-time service rendered in different proportions to a full-time schedule, such member's years of service and average salary shall be proportionately adjusted to produce a retirement benefit equivalent to that payable if his service had been rendered at an unvarying rate.