(i)`underset"3,4,4,5-Tetramethylheptane"(overset1CH_3-overset2CH_2-undersetunderset(H_3C" ")|overset3CH-undersetunderset(CH_3)|oversetoverset(CH_3)|(C^4)-undersetunderset(CH_3)|overset5CH-overset6CH_2-overset7CH_3)`
(ii)`underset"2,5-Dimethylhexane"(overset1CH_3 overset2-oversetoverset(" " CH_3)|CH-overset3CH_2-overset4CH_2overset5-oversetoverset(" " CH_3)|CH-overset6CH_3)`