1.0: https://docs.google.com/presentation/d/1IL0ZcOeU-S2CjZt5ZBCmEG_6mvPpD4bc0UangL5dslY/edit#slide=id.p 2.0: https://docs.google.com/presentation/d/1HlK8NxarTOGSDZu5WY3YVXcoYikp1a24J4Q8aVI_SuY/edit#slide=id.g22bf52df07c_0_49 3.0: https://docs.google.com/presentation/d/1u-D6CUwcq9xmF-KllDL5EOB7xxG6EqNntGhnyrkmf3s/edit#slide=id.g23dcc5990c6_0_49 4.0: https://docs.google.com/presentation/d/1cLoNv8tQ178Cb-5Co17ja33Y3yhvFXdmo7_ESO8L6ds/edit#slide=id.g2538f4af525_0_0