2" p-trap and trap arm.
1-1/2" vent, which on the horizontal should be vented with a combo fitting, not a Santee.
You may want to pick up some hammer arrestors for the washer. They can thread onto the back of the machine and then the hoses attach to them.
Your inspector may allow the santee in that position, they don't in Washington State.
What part of Alaska?
Here is a combo, not turned the right way for your job though.