For each of the following functions, decide whether the function is even, odd, or neither. For each case, give an example of appropriate functions f and g, and check that your answer is right for your example.
`ftext[(]xtext[)]+gtext[(]xtext[)]`, where f and g are both even
`ftext[(]xtext[)] gtext[(]xtext[)]`, where f and g are both odd
`ftext[(]xtext[)]+gtext[(]xtext[)]`, where f is even and g is odd
`ftext[(]xtext[)] gtext[(]xtext[)]`, where f is even and g is odd