Predict the product after each arrow in the following reaction sequences. $(15$ points$)$

i$)$

$PB{r}_3{?}_2{H}_{2}O$

ii$)$

$C{H}_{3}C{H}_{2}OH{?}_{H_{2}S{O}_4,H_{2}O}^{N{a}_{2}C{r}_2{O}_7}C{H}_{3}C{H}_{2}OH$

Write the product of the reaction of the following reactant $($lactone: cyclic ester$)$ with $N{H}_3.(4$ pnintc I

Design efficient synthesis. Write the reagents needed in each step and intermediate products. $(18$ points$)$

i$)$

ii$)$ Take care that $)=(0$ group in the reactant cyclohexanone does not take place in any reaction. $($Hint: You must protect it$.)$