Let f be the linear function (in blue) and let g be the parabolic function (in red) below

Evaluate the following:
1. (f∘g)(2) =?
2. (g∘f)(2) =4
3. (f∘f)(2) =?
4. (g∘g)(2) =4
5. (f+g)(4) =?
6. (f/g)(2) =DNE