For the tax year 2011the Social Security tax rate applied to pre-retirement employees is reduced from 6.2%

Question:

For the tax year 2011the Social Security tax rate applied to pre-retirement employees is reduced from 6.2% to 4.2%. Compute and explain the tax savings for workers in each of the following situations:
a. Annual income of $50,000
b. Annual income of $100,000
c. Annual income of $150,000
d. Annual income of $250,000
e. Compare the above four answers and explain the pattern you observe.