Problem $1$: In the linear regression example, we fit the following model

data $=$ insurance$).$ fit$()$

ins$\_$model.summary $()$

and get the summary shown below:

Based on the model results, answer the following questions.

$[$Note: even if some coefficients are not significant, we keep them in our prediction using

this model.$]$

a$)$ If a male is living in the Southwest region, what would be the predicted increase

in medical expenses if his BMI increases by one unit?

b$)$ If a female is living in the Northeast region, what would be the predicted increase

in medical expenses if her BMI increases by one unit?

c$)$ How much of an increase in medical expenses should be expected if an individual

adopts a child next year?