Scotrail INV-EDB Sat 10:50 seating plan

[Rog7]

Is the 10:50 INV-EDB train on a Saturday normally a class 158 or 170?

My follow-up question would be: is there a numbered seating plan for that service?

 

[AMD]

It's booked as a 170 with a 158 on the back.
Seating plan.... um.... the 170 should be cars A,B & C, but doesn't always work that way!