Date Fill formula

Good afternoon help.

I require help with the attached please.

Excel version is Microsoft 365 subscription.

Can somebody write me a formula that populates the date (1st of the month), in columns J & K, where the start date is the first time a 1.0 appears in the respective row and the end date is the last time a 1.0 is inserted. hope that makes sense.

Start date then populates in Column J

End Date populates in Column K

Dave