Need to replace spark plugs, but can't locate them. Where are they located? on 1998 Toyota 4Runner

Need to replace spark plugs, but can't locate them. Where are they located?

2 answers
I need to change my spark plugs on a cx7 Maxda tr 2007. Where are they located in my car. Please hekp
i need to know where the spark plugs are located on a 1995 pontiac bonneville