I'm new to functions and formulas in Excel. I need to write a series of
functions:

If cells A3, A8, and A12 are greater 4, then the result is 3.
If cells A2, A7, OR A11 equal 3, then the result is 2
If cell A1 equals 1, then the result is 0
The results for all other cells within the range of 1 through 12 is 1