3.3 draw the displayed formulae for alkanes with up to five carbon atoms in a molecule, and name the straight-chain isomers

 3.3 •methane: CH4

       •ethane: C2H6

       •propane:C3H8

       •butane: C4H10

       •pentane: C5H12

       •draw the number of "c's" linked together and branch off them with the "h's" (each 'c' can only have a maximum of 4 'connections')