5. In 2022 , Iris and her employer each contributed $4,000 to her DBPP which will pay her a pension of 1.5% for every year of service based on the three years of income. Her salary for 2022 was $72,000 and the three best years average $71,000. a. What is Iris's pension adjustment for 2022? Calculate the benefit earned using all 3 methods described in class. SHOW ALL YOUR WORK. ( 3 marks) b. How much can she contribute to her RRSP in 2023? (2 marks) c. If she began collecting her pension in 2023, how much would it be if she had 33 years of service? ( 1 mark)