Can someone explain how to solve this?

I would really appreciate a clear explanation

Sunland Corporation having recently issued a $ 20.007.300, 15-year bond issue, is committed to make annual sinking fund deposits of $ 622.600. The deposits are made on the last day of each year and yield a return of 10 Click here to view factor tables Will the fund at the end of 15 years be sufflicient to retire the bonds? Future value of an ordinary annuity Will funds be sufficient? No Sunland Corporation having recently issued a $ 20,007.300, 15-year bond issue, Is committed to make annual sinking fund deposits of $ 622,600. The deposits are made on the last day of each year and yield areturn of 10% Click here to view factor tables Determine the amount of deficiency, mound fuctor values to 5 decima' places, e Deficiency 1.25 124 and finuanswer to Odecinalp aces, eg 458,581 J Under the terms of his salary agreement, president John Walters has an option of recelving elther an immediate bonus of $ 60,500,or a deferred bonus of $ 77000 payable in 0 years Click here to view factor tables lgnoring tax consider atiors and assuming a relevant interest rate of 4%, which form of settlement should walters accept? Present value of deferred bonus