Long-term debt with an incremental borrowing rate of 8 and

Question

The Campbell Company is a manufacture.

Their capital structure consists of

1. Long-Term debt, with an incremental borrowing rate of 8%
2. Capital stock, with the following information:

Risk free rate                              6%
Market rate of return                   13%
Beta                                         1.2
Long-Term debt                          40% of total financing
Capital Stock                              60% of total financing

with steps how you got the answers, because I do have a similar problem that I need to do, just the numbers are different.