Problem 4: Correlation and regression A random sample of size 10 has been drawn to check the relationship between the amount of food additive and corresponding prices per unit of frozen food products. Food additive 15 45 34 23 66 34 22 34 56 22 Price per unit 280 178 190 210 150 139 210 180 140 220 1. Draw a scatter plot to find the relationship between food additives and price per unit. 2. Estimate the correlation coefficient between food additives and price per unit. 3. Fit a causal relationship between food additives and price per unit