Answer:
The lower bound for the price of a 4-month call option on a non-dividend-paying stock is 3.66
Step-by-step explanation:
Lower bound = Stock Price - Strike Price*exp[-rt]
= 28 - 25*exp[-8%*4/12]
= 3.66
Therefore, The lower bound for the price of a 4-month call option on a non-dividend-paying stock is 3.66