Deferred tax on convertible loan notes

Good day
I hope to get support from you in understanding the deferred tax.

The case;
On 1 Apr 2010 the company issued 300 million loan notes of $1 per note at par repayable at par on 31 March 2015. Alternatively they may be converted into equity shares. On 1 April 2010 investors in non-convertible notes would expect an annual return of 8%.
Discount rates 8%:
At the end of year 5 68·1 cents
Cumulatively at the end of years 1–5 $3·99

I calculated the liability element of compound financial instrument at 1 April 2010 (15,000 x $3·99) + (300,000 x $0·681) = 264,150 and the closing balances for the liability in the following years;

Year Principal Fin costs 8% Repmts Closing bal
2011 264.150 21.132 (15.000) 270.282
2012 270.282 21.623 (15.000) 276.905
2013 276.905 22.152 (15.000) 284.057
2014 284.057 22.725 (15.000) 291.781
2015 291.781 23.219 (315.000) 0
TOTAL 110.850

My ask to you to help me to understand the deferred tax implications here, especially:

1. The financial cost total are 110.850 and the taxable cost 5 x 15.000 = 75.000 with the difference of 35.850 accounted as the equity part of the financial instrument.
What are the temporary tax differences on the liability?

2. The definition of the tax base for a liability says ‘The tax base of a liability is its carrying amount, less any amount that will be deductible for tax purposes in respect of that liability in future periods’.
What amount is deductible in each of 5 years?

I would appreciate your support and hints how to deal with such cases.