Machines that have the following costs are under consideration for a new manufacturing process. Compute the Equivalent Annual Worth with an interest rate of $8\%,$ compounded semiannually. The machine last $4$ years.

First cost: $$48,000$

Semiannual Operating cost: $$7,000$

Semiannual incomes: $$14,000$

Salvage value : $$10,000$

a$.$ EAW$=$$$1,065\mathrm{.}50$

b$.$ EAW$=$$$21,745$

c$.$ EAW$=$$$175$

d$.$ EAW$=$$$2,957$