im lost! Im pretty sure I find the price and the calculate NPV but my answer was inncorrect. Please help!

1. Arringtons stock is selling for $20 per share. company just declaned dividend of 2,00 . This dividera is expected to grow at an anmal vate 15\%. for the next 3 years (years 1 to 3) and then from year 4 onwerds dividends are expected to grow at the firms normal growth rate of 6% for the forecasable future. The firms required rate of retum is 18%. The stock is... A. Ovenalued by 8.01 B. undervalued by 8.01 C, undervalued by 2,05 D. overviled by 2,05 Actual P0=$201=18%g13=15%,g40=6%D0=2.00