Consider a digital system characterized by the constellation of the figure with a) Represent the…

Consider a digital  system characterized by the constellation of the figure with
a) Represent the most efficient ML receiver, specifying the decision regions.
b) Determine the correct decision probability P [C|s1] conditioned by transmission of the symbol 1. Determine the total correct decision probability P [C].
c) If the noise variance is  what is the value of Pbit?