Please use the following information to construct a decision tree and then conduct an economic analysis to recommend a smoking cessation program for the employer. Two smoking cessation programs, A and B, are used to help employees quit smoking. Program A works for 40% of smoking employees and the cost of program A is $100. Program B works for 60% of smoking employees and the cost of program B is $500. If an employee fails on either of these two programs, he/she will attend a magic smoking cessation boot camp (cost: $2500) to change the smoking behavior (success rate: 100%). Please select a smoking cessation program for the employer based on your study result, and also indicates which economic analysis is used in this evaluation.