Starhub bonds and shares

My friend invested in Starhub bonds. He asked if if the bonds are safe. (He had invested in Hyflux preference shares and lost nearly all of his invested sum). I look at the financials in Yahoo Finance. 

Here is my analysis of the bonds and the shares.

https://fisca.sg/ArticleDisplay.aspx?ID=700&Name=Starhub-bonds&View=A