How to solve this question by using R Language?

a) Under the assumptions in the logistic regression model, the sum of posterior probabilities of classes is equal to one. Show that this holds for k-K b) Using a little bit of algebra, show that the logistic function representation and the logit representation for the logistic regression model are equivalent. In other words, show that the logistic function: p(X) = is equivalent to: p(X) pW = exp@o + , X a) Under the assumptions in the logistic regression model, the sum of posterior probabilities of classes is equal to one. Show that this holds for k-K b) Using a little bit of algebra, show that the logistic function representation and the logit representation for the logistic regression model are equivalent. In other words, show that the logistic function: p(X) = is equivalent to: p(X) pW = exp@o + , X