A defined benefit plan has $250$ employees with a majority of them under age $45.$ The pension fund manager has collected the following data: Risk$-$Free Rate: $2\mathrm{.}5\%$ Discount rate used to compute pension obligations: $7\mathrm{.}0\%$ Premium to reduce future obligations: $1\mathrm{.}5\%$ Yield to maturity on the company $30-$year bonds: $5\mathrm{.}8\%$ The return objective for the pension fund is closest to: Group of answer choices $5\mathrm{.}8\%.7\mathrm{.}0\%.8\mathrm{.}5\%.9\mathrm{.}5\%.$