1. Refer to the data on the speadsheet "Chapll-Regression with binary dependent variable_dataset", sheet"Mortgage\": The dependent variable y equals 1 if the mortgage loan is approved, 0 otherwise. It is believed that approval depends on the percentage of the down payment x1, and the percentage of the incometo-loan ratio x2. a. For the linear probability model y=|30+ B1X1+ B2X2+p, How do you interpret [31 and I32? What type of estimator are the coefficient of X1 and X2, i.e. B1, [32? b. Predict the loan approval probability for an applicant with a 20% down payment and a 30% income+tohloan ratio. What if the down payment was 30%? (2. Do we need to use the robust standard error here? Explain