A music school has budgeted to purchase 3 musical instruments. They plan to purchase a piano costing $4,000, a guitar costing $550, and a drum set costing $700. The mean cost for a piano is $5,000 with a standard deviation of $2,500. The mean cost for a guitar is $500 with a standard deviation of $200. The mean cost for drums is $900 with a standard deviation of $100. (Enter your answers to two decimal places.) How many standard deviations above or below the average piano cost is the piano? X standard deviations ,f the average How many standard deviations above or below the average guitar cost is the guitar? x standard deviations 4 the average How many standard deviations above or below the average drum set cost is the drum set? X standard deviations J the average