answer all questions with explanation

(5 points) Suppose that we collect observations on a response variable for different values of X ,- , where Y,- | X ,- ~ Bin(n, 1:5). The following linear regression model is proposed for the population level relationship: y3=1x;+;, i=l,...,n. a) (4 points) Determine the variance of the errors from this linear regression model. b) (1 point) Explain the impact of the above result in terms of the assumptions of linear regression