company 1	company 2	company 3	company 4	market
1/1/2020	10%	10%	10%	10%	10%
12/1/2019	20%	40%	10%	40%	20%
11/1/2019	30%	30%	50%	30%	30%
10/1/2019	30%	50%	30%	20%	40%
9/1/2019	40%	40%	20%	10%	50%

a, What is the correlation between company 1 and company 3?

1. 0.50
2. -0.40
3. 0.34
4. -0.05

b, What is the correlation between company 1 and company 4?

1. 0.07
2. -0.10
3. 0.15
4. -0.25

c, If you must hold company 1, which other company is a better option than the others to be added to your portfolio?

1. Company 2
2. Company 3
3. Company 4
4. All equally important

d, What is the beta of the company 2? (hint: check slope)

1. 0.6
2. 0.7
3. 0.8
4. 0.9