John Corp has just issued a new hybrid security, called a J$-$Bond, on the following terms $...$

The current price of John Corp shares is $$30$ and the current yield on John Corp's existing debt is

$10\%$ per annum. John Corp has a cost of equity of $15\%$ per annum, pays no dividends and

interest rates are expected to remain constant for the next few years.

The prices of several one year, European options on John Corp shares is set out in the following

table $...$

What is the current value of one J$-$Bond?