The rate at which people are becoming infected in person per day during the outbreak of a disease was approximated by the function mentioned below where x is in days and x 0 corresponds to the start of the outbreak Complete parts a and b below f x 6xe X a Find the function F x that gives total number of people who have become infected by day x given that 12 people choice were infected when x 0 Select the correct choice below and fill in the answer box to complete your O A To find F x evaluate the antiderivative of f x Therefore F x Type an exact answer B To find F x evaluate the derivative of f x Therefore F x Type an exact answer b Find the total number of people who have become infected by the end of 2 weeks The total number of people who have become infected with the disease by the end of 2 weeks is Round to the nearest whole number as needed Do not round until final answer