A sender sends an n bit message through an unreliable channel which has a bit-error probability p. What is the probabili

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A sender sends an n bit message through an unreliable channel
which has a bit-error probability p. What is the probability
of:
a) (5 points) exactly one bit is flipped from the transmitted
message
b) (5 points) at least one bit is flipped from the transmitted
message
c) (5 points) exactly b bits are flipped from the transmitted
message