20. Saanvi is an art student who works at an art supply store. Her manager has tasked her with analyzing sales at the store. She has a sample of daily sales from several years' worth of sales. She finds, strangely, that there are only six different daily sales amounts in the sample. The percentage of days with each sales total are the following: Sales Amount Percentage of Days With That Sales Total $2 000 $5 000 $7 000 $10,000 $20,000 $30,000 2% a. What is the overall average daily sales? [3 points] b. What is the average value of daily sales on days where sales are at least $10,000? Explain how you get this result (be specific) and show your work along with your answer. [7 points]