Coupon rate $=11\%$

Maturity $=18$ years

Par value $=$ $$1,000$

First par call in $13$ years

Only put date in five years and putable at par value

Suppose that the market price for this bond is $$1,169$Suppose that the call schedule for this bond is as follows:

Can be called in eight years at $$1,055$

Can be called in $13$ years at $$1,000$

And suppose this bond can only be put in five years and assume that the

yield to first par call is $8\mathrm{.}535\%.$ What is the yield to worst for this bond?