PV (risky) - Fixed Income queries

Dear all,

I am looking at 2014 edition of Schweser Notes for Level 2.

Page reference: Page 165 of Reading #45 - Credit Analysis Models

Can I know how the PV(risky) figures are obtained?

What’s the discount rate thats is being used? I couldnt seems to be able to otain the figure of 29.96 for 1st period i.e. 0.5 year