Complete the following reactions `:`
`a.` `(F)overset (+D)larr(E)overset(1.Li)underset(2.Cu l)larr (D)overset(HBr)larrCH_(3)CH=CH_(2)overset(NBS)rarr (A) overset(NBr)underset(RCOOR)rarr(B) overset(Mg)rarr(C)`
`b.` `CH_(3)CH=CH-CH_(3)overset(2NBS)rarr(A)overset(2I^(c-))rarr(B) overset(H_(2)N NH_(2)//O_(2))rarr(C)`
`c.`

Explanation

a. `(A)implies BrCH_(2)CH=CH_(2)`, `(B)implies BrCH_(2)CH_(2)CH_(2)Br,`
`(C)impliesDelta`
`(D)implies CH_(3)-CH(Br)CH_(3),` `(E)implies[(CH_(3))_(2)CH]_(2)CuLi,`
`(F)implies (CH_(3))_(2)CHCH(CH_(3))_(2)`
b. `(A)impliesBrCH_(2)CH=CH-CH_(2)Br,`
`(B)implies ICH_(2)CH=CHCH_(2)I`, `(C)implies ICH_(2)CH_(2)CH_(2)CH_(2)I`
c. `s`
d. `(A)impliesClCH_(2)CH=CH_(2)`,
`(B)impliesCH_(2)=CHCH_(2))_(2)CuLi`,
`(C)impliesCH_(2)=CH-CH_(2)-CH_(2)CH=CH_(2)`
e.
f.