Answer:
1) 19 days
2) 109 days
Explanation:
1. Days of personal use = days in which he stayed in the house = 19
2. Days of rental use = actual days which was played for out days for elligible rent.
Where Fbr = favorite brother rent days = 11
Fbl = least favorite brother rent days = 12 days
Rfb = days of rent to friend = 14
Tpr = third party rent days = 72
Days of rental use = Fbr + Fbl + Rfb + Tpr = 11 + 12 + 14 +72 = 109days