The step function f(x) is graphed.

On a coordinate plane, a step graph has horizontal segments that are each 2 units long. The left end of each segment is a closed circle. The right end of each segment is an open circle. The left-most segment goes from (negative 6, negative 3) to (negative 4, negative 3). Each segment is 1 unit higher and 2 units farther to the right than the previous segment. The right-most segment goes from (4, 2) to (6, 2).
What is the value of f(1)?

0
1
2
4