Determine the empirical and molecular formulas of a compound given its percentage composition by mass:
4.07% hydrogen, 24.27% carbon, and 71.65% chlorine, with a molar mass of 98.96 g/mol.

1. CH₂Cl and C₂H₄Cl₂

2. CH₃Cl and C₂H₆Cl₂ 

3. C₂HCl and C₄H₂Cl₂ 

4. C₂HCl and C₂H₄Cl₂