LYNN – Two of three Swampscott teens charged with egging a Lynn cop who was posing as a prostitute admitted Thursday to sufficient facts to find each guilty of assault and battery and will each receive a year’s probation.Jacob Finlay, 19, and Spencer Webber, 19, both of Swampscott, admitted to sufficient facts for a finding of guilty of assault and battery; and underage possession of alcohol; stemming from a June 2013 incident in Lynn.Co-defendant Joseph Patsios, 19, also of Swampscott, is scheduled for a likely disposition on Aug. 26. His attorney requested a continuance to Thursday’s court date because the defendant is at college orientation, according to court documents.A Lynn Police officer posing as a prostitute during an undercover john sting near Union and Pinkham streets June 7, 2013, reported a blue Audi repeatedly drove past and its occupants yelled and then threw things at her. On the car’s fourth trip, the officer got hit in the leg with an egg. Police stopped the vehicle as it was headed back for a fifth round and found a bag of marijuana, a bottle of vodka and eggs stowed “everywhere” inside the car.Patsios was driving the car, Webber was in the front seat and Finlay was in the backseat.Police noted that during booking the teens seemed to think the incident “was funny.”The youths were each charged with assault and battery with a dangerous weapon, an egg; and underage possession of alcohol.Lynn District Court Judge James LaMothe Thursday did not find a sufficient factual basis to conclude that the egg constituted a dangerous weapon and reduced the charge to assault and battery, according to Finlay’s attorney Clint Muche. LaMothe noted the commonwealth’s objection.Finlay and Webber each admitted to sufficient facts for a guilty finding in the reduced assault charge and the underage possession of liquor charge. LaMothe ordered the cases continued without a finding of guilty or not guilty for one year during which the youths must remain drug and alcohol free with random screenings, write a letter of apology and complete 40 hours of community service in Lynn, according to court documents. The charges will be dismissed if Finlay and Webber successfully complete probation.”(Finlay) sincerely regrets his involvement in this unfortunate incident and is looking forward to completing the conditions of probation and being able to put this behind him in a year,” Muche said Thursday.Webber’s attorney, Matthew Thompson, declined to comment.