In Example 25.2, what is the tranche spread for the 6% to 9% tranche assuming a tranche correlation of 0.15?

Example 25.2

A 5-year credit default swap requires a quarterly payment at the rate of 60 basis points
per year. The principal is \($300\) million and the credit default swap is settled in cash.
A default occurs after 4 years and 2 months, and the price of the cheapest deliverable
bond is estimated as 40% of its face value shortly after the default. List the cash flows
and their timing for the seller of the credit default swap.