Answer: 8.85%
Explanation:
Using the Gordon Growth Model, the variables in the question can be used to calculate stock price so can be reassigned to calculate require return as well.
Stock price = Next dividend / ( Required return - growth rate)
150 = (5.50 * 1.05) / (Required return - 5%)
150 * (Required return - 5%) = 5.775
Required return - 5% = 5.775/150
Required return = 5.775/150 + 5%
= 8.85%