For the Past 50 Days, Daily Sales of Laundry Detergent $$\begin{array} { c c } \text { Units Sold } & \text { Number of Times } \\\hline 30 & 8 \\40 & 12 \\50 & 15 \\60 & 10 \\70 & 5\end{array}$$

For the past 50 days, daily sales of laundry detergent in a large grocery store have been recorded (to the nearest 10). $$\begin{array} { c c } \text { Units Sold } & \text { Number of Times } \\\hline 30 & 8 \\40 & 12 \\50 & 15 \\60 & 10 \\70 & 5\end{array}$$
a.Determine the relative frequency for each number of units sold.
b.Suppose that the following random numbers were obtained using Excel:
.12
.96
.53
.80
.95
.10
.40
.45
.77
.29
Use these random numbers to simulate 10 days of sales.