The accompanying table lists a portion of the ages and net worth of the 25 wealthiest people in the United States in 2019.

Rank	Name	Age	Net Worth
1	Jeff Bezos	56	131.0
2	Bill Gates	64	96.5
3	Warren Buffet	89	82.5
4	Larry Ellison	75	62.5
5	Mark Zuckerberg	35	62.3
6	Michael Bloomberg	77	55.5
7	Larry Page	46	50.8
8	Charles Koch	84	50.5
9	Sergey Brin	46	49.8
10	Jim Walton	71	44.6
11	Alice Walton	70	44.4
12	Rob Walton	75	44.3
13	Steve Ballmer	63	41.2
14	Sheldon Adelson	86	35.1
15	Michael Dell	54	34.3
16	Phil Knight	81	33.4
17	Jacqueline Mars	80	23.9
18	Elon Musk	48	22.3
19	Jim Simons	82	21.5
20	Rupert Murdoch	88	19.4
21	Laurene Powell Jobs	56	18.6
22	Ray Dalio	70	18.4
23	Len Blavatnik	62	17.7
24	Carl Icahn	83	17.4
25	Thomas Peterffy	75	17.1

a. Construct a stem-and-leaf diagram. What are the ages of the youngest and oldest people in this group? 

b. Is the distribution symmetric? Explain.  

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Rank 1 2 ⠀ 25 Name Jeff Bezos Bill Gates ⠀ Thomas Peterffy Age Net Worth 56 131.0 64 96.5 ⠀ 17.1 75