Answer:
$20.38 buy
Step-by-step explanation:
The computation of present value is shown below:-
Fair Value according to Gordon Model = Expected Div ÷ (Required Return - Growth rate)
= $1.63 ÷ (10.5% - 2.5%)
= $1.63 ÷ 8% 
= $20.38 
Fair Price = $ 20.38 and Actual Price = $18.00
 As Fair Price is greater than the Actual Price so, the stock is under priced. Therefore advice to buy.