If exactly 194 people sign up for a charter flight, Leisure World Travel Agency charges $312/person. However, if more than 194 people sign up for the flight (assume this is the case), then every fare is reduced by $1 times the number of passengers above 194. Determine how many passengers will result in a maximum revenue for the travel agency. Hint: Let x denote the number of passengers above 194. Show that the revenue function R is given by R(x