Draw a complete structural formula for each of the straight-chain isomers of the following alkanes:
a. \mathrm{C}_{4} \mathrm{H}_{9} \mathrm{Br}
b. \mathrm{C}_{4} \mathrm{H}_{8} \mathrm{Br}_{2}
a. The straight chain isomers of molecular formula \mathrm{C}_{4} \mathrm{H}_{9} \mathrm{Br} :
b. The straight chain isomers of molecular formula \mathrm{C}_{4} \mathrm{H}_{8} \mathrm{Br}_{2} :