FSM (Finite State Machine)

I'm very confused on how to go about this

Consider a finite state machine (FSM) that recognizes the pattern "1101". The input to the FSM is a sequence of binary bits, one after the other. When the FSM receives 1101 as inputs in successive bits, it should output 1. Otherwise, the output should be 0. For example Input sequence: 11011011001101 FSM output: 00010010000001 1) Draw the state diagram for this FSM and describe what each state represents