1) Based on the following confusion matrix, solve questions 1-5 Actual class Predicted Class 1 0 1 100 20 0 10 170 Calculate the error rate and the accuracy based on the confusion matrix 2) Calculate the error rate and accuracy based on the nave rule 3) Calculate the sensitivity, specificity, false positive rate and false negative rate 4) When the revenue from l" is $10 and the cost of sending the offer is $1, draw the opportunity of the cost matrix (1: potential customer; 0: no potential customer)