Написать 3 гомолога и 3 изомера гептана (С7Н16)

Гомологи: С6H14(гексан) H3C-CH2-CH2-CH2-CH2-CH3 C8H18(окатан) H3C-CH2-CH2-CH2-CH2-CH2-CH2-CH3 C3H8(пропан) H3C-CH2-CH3 Изомеры (у всех формула С7H16): 2,3-диметилпентан                 CH3                                                   !                                   H3C-CH-CH-CH2-CH3                                            !                                                 CH3 3-этилпентан                                    H3C-CH2-CH-CH-CH3                   !                  С2H5 2,4-диметилпентан                      CH3                                                       !                                              H3C-CH-CH2-CH-CH3                                                                      !                                                                      CH3    2,3,3-триметилбутан                                                                         CH3                                                                         !                                                       H3C-CH - C-CH3                                                                !        !                                                               CH3   CH3