i need yr help. i tried to understand it but i didn't understand it.

so can you guys help me please

1. draw structural formulas for 3 isomers of C3H8O

2. draw structural formulas for all possible isomers having the following molecular formulas C3H6, C3H8, C4H10O, C3H7Cl, C4H9F, C2H2I2, C2H4F2, C3H6Cl2

                                                   thank you guys