Answer:
None of above options are correct. 7.8% .
Step-by-step explanation:
Rf = 5.5% - 1.5% = 4%
Rhri = 4% + 1.8*(10.5% - 4%) = 15.7%
Rlri = 4% + 0.6*(10.5% - 4%) = 7.9%
Difference = 15.7% - 7.9% = 7.8%
The difference (in percentage points) in the required returns for HRI and LRI is 7.8%