please show step by step of the process

Q1. Please follow the video lectures and practice the ideas with the following dataset: GPA_Dataset xisx 1. Please apply a multiple linear regression model, use the high school GPA, SAT and in of recommendation to predict the students' GPA. 2. Explain the model. (Eg: What is the model formula? the coefficient? R square? P-value? which variableivariables is/are statistics significant, which one/ones is/are not? What is the meaning of the coefficient?) Q2. Please apply time-series models to finish the following table. exercise xisx Q3. Please make sure you understand how to create the chart to compare the sale and forecasting for the example shown in class (no submission needed for Q3) in class exercise and in the blue column