$($Compound interest$)$ To what amount will the following investments accumulate?

a$.$ $$4,800$ invested for $8$ years at $9$ percent compounded annually.

b$.$ $$7,800$ invested for $8$ years at $8$ percent compounded annually.

c$.$ $$750$ invested for $11$ years at $11$ percent compounded annually.

d$.$ $$19,000$ invested for $4$ years at $6$ percent compounded annually.

a$.$ To what amount will $$4,800$ invested for $8$ years at $9$ percent compounded annually accumulate?

$($Round to the nearest cent.$)$