5. Assume you like to apply the decision tree predictive model to a sample of 10000 customers to effectively target the customers who are more likely to purchase your products. If your budget allows you to mail promotion only to 5000 customers and you use the decision tree results to mail to your customers, how many among those customers will likely purchase your products? If you mail to your customers without using the decision tree model, how many among them will likely purchase your products? [Note: You must show all your work clearly to receive full points]