Answer: 11.48%; 11.47%
Step-by-step explanation:
Given that,
Dividend Issued on common stock = $1.20 per share
Dividend paid in last four years:
$.85 per share
$.92 per share
$.99 per share
$1.09 per share
Stock currently sells at = $53
Calculation of growth rates in dividends :
 
G1 = 

 = 8.24% 
 
G2 = 

 = 7.6% 
 
G3 = 

 = 10.1% 
 
G4 = 

 = 10.09%
(1) Arithmetic growth Rate = 

 = 9.01% 
 Cost of Equity = 

 = 11.48%
(2) Geometric growth Rate 

 G = 9% 
 Cost of Equity = 

 = 11.47%