4. Perform the below steps for linear regression: Create a linear regression model Set feature_cols to Installers column data only Set X to feature_cols Set y to installer retained for 30 days Print the shape of X Print the description of X Print the shape of y Print the description of X Fit the linear regression model with X and y Get predictions for retained for 30 days with 1 install Get predictions for retained for 30 days with 2 installs Get predictions for retained for 30 days with 4 installs Print the intercept Print the coefficient