Rework problem 27 from section 4.1 of your text involving a poll of registered voters. Assume that 40 percent of voters are Republicans, 25 percent are Democrats, and 35 percent are Independents. A poll taker asks 9 people at random for their party affiliation. Assume further that, because the city is so large, this situation can be approximated by a Bernoulli process. What is the probability that at least 6 of those polled are Democrat voters?.