Can someone please let me know what the firing order of a 2010 Journey SXT with the 3.5L engine is?

1-3-5 front or back of engine

I have a cylinder 5 misfire detected code and there is a real loss of power when climbing a hill (small or large) and the Journey has an unbelievable shake during this period, also the engine light comes on.

 

what is the order?

 

Should be back of engine, #1 is at left (when standing in front looking to rear) and #5 on right.
Firing order is 1-2-3-4-5-6

Engine as looked at from front:

1 - 3 - 5
2 - 4 - 6

Hope that helps.