The amount of the estimated average annual income for a proposed investment of $$65,000$ in a fixed asset, giving effect to depreciation $($straight$-$line method$),$ with a useful life of $4$ years, no residual value, and an expected total income yield of $$3\mathrm{.}9,000,$ is

a$.$ $$16,250$

b$.$ $$9,750$

c$.$ $$-6,500$

d$.$ $$39,000$