Which of the following can be one of the steps in stacking?1. Divide the training data into k folds2. Train k models on each k-1 folds and get the out of fold predictions for remaining one fold3. Divide the test data set in “k” folds and get individual fold predictions by different algorithms

Machine learning (ML) is a branch of artificial intelligence that leverages data to improve computer performance by giving machines the ability to "learn", or improve performance — based on the data.

There are four basic approaches to machine learning: supervised learning, unsupervised learning, semi-supervised learning and reinforcement learning.