A musical instruments retailer has 10,000 point-of-sale transactions out of which 1500 sales included both items of electric guitars and guitar cases, and out of which 750 had sales of new strings. The total number of transactions for strings is 3000. If the electric guitars are considered A, the guitar cases are considered B, and the strings are considered C, then the associate rule for these sales becomes: "If A and B are purchased, then C is also purchased."

1. The confidence level of this rule is:
2. 1.Calculate the expected confidence in musical retailer rule. Enter the number as a decimal.
3. 2.Calculate the lift for this rule, given that the total transactions for C is 3000. Round to two decimals.