Question to example 8 of R46 (Fixed Income)

Hi, I have a question to the example of p. 420/421 (Powder Corporation) for R46 (Credit Analysis Models) - Fixed Income (CFA Textbook)

how do they derive in solution 1 & 2 to the PV? For solution 2, the 23.3643 is derived using the continuously compounded total yield.

Thx for any help!!