According to T. Rowe Price Associates, a person with a moderate investment strategy and n years to retirement should have accumulated savings of an percent of his or her annual salary. The geometric sequence a_n = 1276(0.916)ⁿ gives the appropriate percent for each year n.

(a) Find a₁ and r. Round a₁ to the nearest whole number.

(b) Find and interpret the terms a₁₀ and a₂₀. Round to the nearest whole number.