Nearest lift

Write a function chooseLift(liftA, liftB, callFloor) that returns which of two lifts goes to a person: the string 'A' or 'B'. A building has two lifts, A and B. The person is on floor callFloor and presses the "up" button.

• All three parameters are floor numbers: whole numbers from 0. liftA and liftB are the floors where the lifts stand now.
• The distance from a lift to the person is the absolute value of the difference of the floors: Math.abs(liftA - callFloor).
• The lift with the smaller distance goes.
• If the distances are equal and the lifts are on different floors, the lift below callFloor goes: it moves up anyway, the same way the person wants to go.
• If both lifts are on the same floor, 'A' goes.
• Return the name of the lift, not its floor.

An if statement with comparison operators is enough.