19 year old DUI with BAC of 0.10, what will happen when he goes to court?

He is 19, got pulled over for expired registration tags in california. The other passengers in the car had been drinking all night which is why he got breathalyzed. He had 2 beers before going behind the wheel. He blew 0.10. He spent the 6 hours in Jail and was released in the morning. What are the possibilities for his sentencing? i.e. will he have to go to jail, or house arrest? How long will his license be suspended? probation? ETC. Will having an attorney make things better and how much better will things be if he gets an attorney? is there any way that with an attorney his license will not be suspended for a year?