(Solved): 3.) Union bound Assume a ternary alphabet of 2,0,+2. Use the Union Bound to estimate the error p ...

3.) Union bound Assume a ternary alphabet of $?2,0,+2$. Use the Union Bound to estimate the error probability of the symbol. Note that the probability of a transition between to neighboring points of distance 2 under AWGN with variance ${?}_n^2$ is $p=$ $\frac{1}{2}\mathrm{erfc}\left(\frac{1}{\sqrt{2}{?}_n}\right)$. Determine the Union Bound for the symbol error probability.