Please show any work done and show the keystrokes on a calculator. Thank you!

H. Manufacturer Claims You work for a consumer watchdog publication and are testing the advertising claims of a light bulb manufacturer, the manufacturer claims that the life span of the bulb is normally distributed, with a mean of 2000 hours and a standard deviation of 250 hours. You test 20 light bulbs and get the following life spans 2210, 2406. 2267, 1930. 2005. 2502. 1106. 2140. 1949, 1921 2217, 2121, 2004 1397, 1659 1577. 2840 1728 1209, 1639 (a) Draw a frequency histogram to display these data, Ise five classes, Is it reasonable to assume that the life span is normally distributed? Why? (You will need to create a frequency distribution before creating the frequency histogram). Frequency Distribution Frequency Histogram Class Midpoint (b) Find the mean and standard deviation of your sample