Answer: b. 7.59%
Step-by-step explanation:
Using the Gordon growth model;
Price of stock = (Current dividend * (1 + growth rate))/(Cost of capital - growth rate)
87 = (3 * 1.04) / (c - 0.04)
87 * (c - 0.04) = 3 * 1.04
c - 0.04 = 3.12/87
c = 0.035862 + 0.04
c = 0.075862
c = 7.59%