please help me solve these 4 questions.

Data For the rst two problems, please use the following data: In order to reduce my email load, I decide to implement a machine learning algorithm to decide whether or not I should read an email, or simply le it away instead. To train my model, I obtain the following data set of binaryvalued features about each email, including whether I know the author or not, whether the email is long or short, and whether it has any of several key words, along with my nal decision about whether to read it (y = +1 for \"read\