week 3 submissions in submission folder#2

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pdavenport wants to merge 4 commits intomasterfrom

Commits on Jun 26, 2019

updated toy problem images
gradmaximus
committed

Commits on Jun 29, 2019

merging with upstream
pdavenport
committed

Commits on Jun 30, 2019

final submissions for branch week3
pdavenport
committed

Commits on Jul 1, 2019

added files to submission folder
pdavenport
committed