What are the functions of the following python codes?

model.fit(x,y, epochs =150, verbose =0)

A. Generate predicted outcomes for input dataset X using an existing neural network model

b. Build a neural network model using training datasets X and y

c. Examine whether an existing neural network model fits data X and y.

d. Generate X and y. They will be used as the training datasets for building a neural network model in the next step