$(1)$ Complite the following reactions. thi

a$)$

b$)C{H}_{3}C{H}_{2}CHC{H}_3(C{H}_3{)}^{\text{@}}{?}^{\text{@}}C{H}_{3}C{H}_{2}CH=C{H}_2$

$Br$

c$)$

d$)$

$(2)$ Synthesize $C{H}_{3}CH=CC{H}_{2}C{H}_3,$ starting with $C{H}_{3}C{H}_{2}Br$

and $C{H}_{3}C{H}_2^{O}CC{H}_3*C{H}_3$

Compounds to $($Hint How can you join the two starting

Compounds together?$)$ please help me find out what the major concepts are behind these questions so I can learn them and find youtube videos for my exam please thank you so much