Answer:
17.6%
Step-by-step explanation:
According to the scenario, computation of the given data are as follow:- 
We can calculate the rate of return on the stock by using following formula:- 
Expected Provide Rate of Return = Estimate Rate of Return on the Stock + (Expected IP × Stock with a Beta on IP) + (Expected IR × Stock with a Beta on IR) 
Before estimate rate of return on the stock 
 = 16% = α + (4% × 1) + (5% × 0.6) 
= 16% = α + (0.04 × 1) + (0.05 × 0.6) 
= 0.16 = α + 0.04 + 0.03 
= 0.16 - 0.04 - 0.03 = α 
α = 0.09 =9% 
Rate of return after the changes 
= 9% + (5% × 1) + (6% × 0.6) 
= 0.09 + 0.05 + 0.036 
= 0.176 
= 17.6% 
According to the analysis, New rate of return on the stock is 17.6%