p1: https://www.slideshare.net/AnthonySefton/p1-media-1pptx
p2: https://www.slideshare.net/AnthonySefton/p2-media-1pptx
p3: https://www.slideshare.net/AnthonySefton/p3-250366275?next_slideshow=250366275
p4:
m1: https://www.slideshare.net/AnthonySefton/m1-2pptx
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