Both 2 and 4.
starting from left to right on spark plugs you have 1234 1 goes to 1 - 2 goes to 4 on distrubitor -3 goes to 2 - and4 goes to 3
12, 24, 36, 48, 60, 72, 84, 96
3
The GCF is 1.
It is 12
It is 12
What goes in 100 equally
116
12
5/2
25 goes into 100 and 75.
It is 84