Please provide a worked out answer for questions $5-7$ but using the expression C$1=$Y$1(1+$r$)+$Y$2/(1+$B$)(1+$r$)$ as opposed to C$1=$ Y$1(1+$r$)+$Y$2/(1+$r$)$; this is because i need to calculate the answer as though the preference equation is ln$($C$1)+$ B$*$ln$($C$2)$ as opposed to ln$($C$1)+$ln$($C$2)$; then assume B$=1$ when it is time to plug in numbers