Consider the following constellation diagram and a host transmitting the symbol highlighted in black. Assume that due to transmission errors, the received combination of amplitude and phase falls in one of the neighboring Voronoi polygon. What is the maximum number of bit errors that can occur?

0000 0001 0010 0011 0100 0101 0110 0111 1000 10011010 1011 1100 1101 1110 1111 0000 0001 0010 0011 0100 0101 0110 0111 1000 10011010 1011 1100 1101 1110 1111