Can someone please help with this question

Can someone please help me understand how the answer is 2.7%?

Also, if its a 50 bp decline in YIELD, shouldn’t the spreads ideally widen? Which yield are the talking about (benchmark or corporate bond?)

Ffs these questions are a joke. Please help

Can someone please help me understand how the answer is 2.7%?

Also, if its a 50 bp decline in YIELD, shouldn’t the spreads ideally widen? Which yield are the talking about (benchmark or corporate bond?)

Ffs these questions are a joke. Please help