Suppose a company has the chance to make an investment that will result in a profit of $10$ billion if it is successful but the company will be worthless and go bankrupt if the investment is unsuccessful. The firm has bonds that pay $8\%$ annual interest rate and have a value of $$1,000$ per bond and stock that sells for $$12$ per share. If the new project is successful, the price of the stock will jump to $$18,$ but the value of bonds will remain $$1,000$ per bond. The probability of successes is $40\%$ and the probability of failure is $60\%.$ What is the expected return on bond?

$-60\%$

$-10\%$

$-20\%$

$-100\%$