Question 13 5 pts Bart, a single taxpayer, has recently retired. This year, he received $21,000 in pension payments and $5,000 of social security payments. What amount must Bart include in his gross income for the social security payments? O $4,250 $2,500 $750 $0

Question 13 5 pts Bart, a single taxpayer, has recently retired. This year, he received $21,000 in pension payments and $5,000 of social security payments. What amount must Bart include in his gross income for the social security payments? $4,250 $2.500 $750 $0