5. The number of times that an individual contracts a cold in a given year is a Poisson random variable with parameter 1 = 5. Suppose a new wonder drug (based on large quantities of vitamin C) has just been marketed that reduces the Poisson parameter to 1 = 3 for 75% of the population. For the other 25% of the population the drug has no appreciable effect on colds. If an individual tries the drug for a year and has 2 colds in that time period, how likely is it that the drug is beneficial for him/her