please explain.

52 48 John (age xx) and Mary (age xx ) both work. John islis not covered by a pension plan where he works. Mary is/is not covered by a pension plan where she works. John and Mary will file a joint income tax return for 2021. Their only income in 2021 is from wages as follows: John - wages Mary - wages $ xock 95,000 XXX 100,000 REQUIRED: a. What is the MAXIMUM allowable deductible contribution that John can make to his traditional Individual Retirement account for 2021? b. What is the MAXIMUM allowable deductible contribution that Mary can make to her traditional Individual Retirement account for 2021? C. What is the MAXIMUM allowable deductible contribution that John can make to his Roth Individual Retirement account for 2021 ASSUMING THAT NO CONTRIBUTION IS MADE TO A TRADITIONAL IRA? What is the MAXIMUM allowable deductible contribution that Mary can make to her ROTH Individual Retirement account for 2021 ASSUMING THAT NO CONTRIBUTION IS MADE TO A TRADITIONAL IRA