If a marginal embankment has been designed to withstand the 20-year return period flood, calculate (a) the probability that the area protected by the embankment will be flooded at least once in the...

If a marginal embankment has been designed to withstand the 20-year return period flood, calculate (a) the probability that the area protected by the embankment will be flooded at least once in the next 10 years; (b) the probability the protected area will be flooded at least three times in the next 10 years and (c) the probability the protected area will be flooded no more than three times in the next 10 years