please explain step by step using a TI-84 calculator

The bond consists of a 20 -year, 10% annuity of $50 yyear plus a $500 lump sum at t=20. What are present value of annuity, present value of maturity, and vaue of bond? $422.68,$77.32, and $500 $420.68,$79.32, and $500 $415.68,$84.32, and $500 $325.68,$174.32, and $500 $424.68,$75.32, and $500 $425.68,$74.32, and $500