See the links in order to review the key concepts.
https://docs.google.com/presentation/d/1s84Z2UVu95OU4PI5tDF4Niw7Vc_DLBFbPJg-K_lq8nA/edit?usp=sharing
https://docs.google.com/presentation/d/1FXPwmJ7ktT2d0ecgtPmwOBf5Zp47MuMu9u_2dZnyfmQ/edit?usp=sharing
https://docs.google.com/presentation/d/1pk2MKKkC5EEAqWWpL56AHWoxKRj-NdmNESktovZEceI/edit?usp=sharing
https://docs.google.com/presentation/d/1lNLaw10sEjsV5AOKtyNKIlfwyrHrJIu9PQzhiyNEyiA/edit?usp=sharing
https://docs.google.com/presentation/d/1KnZUuiMv8dPtUHbHxBHuqUxb4N2efELYvEl7ae2mRx8/edit?usp=sharing