Step 1 :The function f(x) is defined as a piecewise function, which means it has different definitions for different ranges of x.
Step 2 :To evaluate f(1), since 1 is less than or equal to 2, we use the first function (-x-2). So, f(1) = -1 - 2 = -3.
Step 3 :To evaluate f(2), since 2 is equal to 2, we also use the first function (-x-2). So, f(2) = -2 - 2 = -4.
Step 4 :To evaluate f(6), since 6 is greater than 2, we use the second function (x-6). So, f(6) = 6 - 6 = 0.
Step 5 :Final Answer: \(f(1)=\boxed{-3}\), \(f(2)=\boxed{-4}\), \(f(6)=\boxed{0}\)