Revisões

https://docs.google.com/presentation/d/1FYebsIpafLBvaiYp_vnOA06fHJQAQev6XDj-O91d6Cw/edit?usp=sharing
Continuação: https://docs.google.com/presentation/d/1f_gBLXtxLNvVQHZ16xPTCIItx4G5mvmnZ4oixqXGvQE/edit?usp=sharing