Suppose the price of a $1$ Y bond with a face value of PLN $15000,$ interest $5\%$ pa$.$ under yearly capitalization and coupons paid annualy is PLN $13000.$ Determine a $1$ Y spot rate pa$.$ under

continuous compounding using the bookstrap method.

$0\mathrm{.}048790$

$0\mathrm{.}143101$

$0$

$0\mathrm{.}191891$

$0\mathrm{.}050000$