This is the data set. I would like to see a multilinear regression implementation of this dataset.

I do not need the explanation, I want to see an implementation on Python, with :

a) Multilinear Regression

b) Feature Forward Selection.

in age Isex smoker O yes 1 no 3 no 19 female 18 male 28 male 33 male 32 male 31 female 46 female 37 female bmi children 27.9 33.77 33 22.705 28.88 25.74 33.44 27.74 region southwest southeast southeast northwest northwest southeast southeast northwest charges 16884.924 1725.5523 4449.462 21984.4706 3866.8552 3756.6216 8240.5896 7281.5056 woo in age Isex smoker O yes 1 no 3 no 19 female 18 male 28 male 33 male 32 male 31 female 46 female 37 female bmi children 27.9 33.77 33 22.705 28.88 25.74 33.44 27.74 region southwest southeast southeast northwest northwest southeast southeast northwest charges 16884.924 1725.5523 4449.462 21984.4706 3866.8552 3756.6216 8240.5896 7281.5056 woo