5.Which is NOT a financial problem facing the Social Security system?

a.the number of retirees is increasing.

b.the ratio of workers to retirees is increasing.

c.actual cost of living adjustments often overstate true inflation.

d.life expectancy beyond retirement age has been increasing.

6.A negative income tax that gives $6,000 to an individual with no earned income and has an effective marginal tax rate ( i e., phase out rate) of 50% will provide some welfare to those individuals with incomes up to:

a.$3,000.c.$12,000.

b.$6,000.d.$24,000.

Please answer both questions with explanations!