Is it possible to assign logic levels so that a device with the transfer characteristics shown in

Question:

Is it possible to assign logic levels so that a device with the transfer characteristics shown in Figure 1.46 would serve as a buffer? If so, what are the input and output low and high levels (V_IL,V_OL,V_IH, and V_OH) and noise margins (NM_L and NM_H)? If not, explain why not.

Vout 5- 4 - 3- 2- 1 Vin 0 1 3 4 5 Figure 1.46 DC transfer characteristics