Which graph represents the function f(x) = 4⌈x⌉? 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 (0, 4) to (1, 4). each segment is 2 units higher and 2 units farther to the right than the previous segment. the right-most segment goes from (3, 16) to (4, 16). on a coordinate plane, a step graph has horizontal segments that are each 2 units long. the left end of each segment is an open circle. the right end of each segment is a closed circle. the left-most segment goes from (0, 4) to (1, 4). each segment is 2 units higher and 2 units farther to the right than the previous segment. the right-most segment goes from (3, 16) to (4, 16). 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 (0, 0) to (1, 0). each segment is 2 units higher and 2 units farther to the right than the previous segment. the right-most segment goes from (3, 12) to (4, 12). on a coordinate plane, a step graph has horizontal segments that are each 2 units long. the left end of each segment is an open circle. the right end of each segment is a closed circle. the left-most segment goes from (0, 0) to (1, 0). each segment is 2 units higher and 2 units farther to the right than the previous segment. the right-most segment goes from (3, 12) to (4, 12).