Students in an introductory psychology course were asked to participate in an experiment examining the relationship between quality of sleep and perceived stress. Each student in the class kept track of the quality of his or her sleep for seven consecutive days using a 5-point scale where 1 indicated very poor quality, 3 indicated average quality, and 5 indicated excellent sleep quality for the previous night. At the end of the week, each student donated a small hair sample consisting of approximately 20 to 30 strands of hair. The level of cortisol in the hair sample was obtained (in nanograms per gram of hair). Higher levels of cortisol indicate higher levels of stress. The table below shows the raw data from the 50 students in the study.

Hair cortisol level (in ng/g) and sleep quality ratings (1-5)

ID	Sleep Quality	Cortisol	ID	Sleep Quality	Cortisol	ID	Sleep Quality	Cortisol	ID	Sleep Quality	Cortisol
1	3	136	16	4	103	31	3	79	46	1	35
2	3	74	17	4	31	32	2	105	47	5	166
3	3	143	18	4	81	33	3	145	48	5	83
4	4	137	19	4	97	34	1	48	49	1	165
5	1	107	20	2	151	35	1	194	50	2	51
6	2	136	21	3	140	36	2	174
7	1	151	22	4	97	37	2	99
8	1	177	23	4	109	38	2	28
9	5	140	24	3	199	39	4	130
10	3	61	25	3	69	40	4	148
11	2	41	26	4	26	41	5	179
12	5	189	27	1	112	42	5	189
13	2	79	28	3	201	43	3	129
14	2	43	29	2	34	44	2	80
15	2	170	30	2	110	45	1	79

Use the data to answer the following questions:

1. Create frequency distributions of both the sleep quality and cortisol levels.
2. Draw a graph showing the distribution of sleep quality in the sample.
3. Draw a graph showing the distribution of cortisol in the hair sample.