Help me plz
For integers $n$, let f(n)={n if n is odd,n−1 if n is even. Find $f(f(f(f(f(4)))))$.
Find
f(4) = 4 -1 = 3
f (f(4)) = f(3) = 3
f (f(f(4))) = f(3) = 3
f(f(f(f(4)))) = f(3) = 3
f(f(f(f(f(4))))) = f(3) = 3
+818 
