How can you obtain iodoethane from ethanol when no other iodine containing reagent except NAI is available in the laboratery?

Explanation

First convert ethanol to chloroethane on treatment with HCl (g) and anhyd. `ZnCl_(2)` ((or bromoethane on treatment with `P+Br_(2)`) and then to iodoethane on treatment with NaI in acetone by Finkelstein reaction.
`underset("Ethanol")(CH_(3)CH_(2)OH)+HCl overset("Anhyd. "ZnCl_(2))to underset("Chloroethane")(CH_(3)CH_(2)Cl+H_(2)O`
`underset("Ethanol")(CH_(3)CH_(2)OH)overset(P+Br_(2))to underset("Bromoethane")(CH_(3)CH_(2)Br)`
`underset("Chloroethane")(CH_(3)CH_(2)Cl) " or "underset("Bromoethane")(CH_(3)CH_(2)Br)+NaI underset(("Finkelstein reaction"))overset("Acetone")to underset("Iodoethane")(CH_(3)CH_(2)I)+NaCl " or "NaBr`