HuntCorp is trading, on the 4th of July, at $10. On the 5th of July, Hungry Joe announces the intention to buy the company, and HuntCorp's share price reacts by soaring to $15. On the 7th of July Big Ben announces that they would also like to take over the company, and the price of HuntCorp goes to $16. After a few weeks of negotiations, Big Ben completes the acquisition paying $18 for each share of HuntCorp. The purchase premium price paid by Big Ben is:
a) $3 per share
b) $8 per share
c) $10 per share
d) There is not enough information to answer this question