$4)$ For the following problem, identify and$/$or define the following: The X matrix, the y vector, what are the samples, the classes or predicted values, define a set of features, define the dimensions of X and y and indicate what they mean.

Problem: You build a model that uses a sensor that goes underwater in a big river such as the Mississippi. The goal of the model is to detect the type of boat by listening to the movement of the boat, and the spinning of the propeller, etc. Identify and define the problem.