Translated Week5-Using_-Answer. Close #396.
Translated 05a-Multikey_Indexes-Lecture. Closes #387
Edits according to feedback, refs #369.
Fix translation for a minor bad transcription. refs #396.
Fixed typo according to comments by @puentesarrin #387
Merge pull request #412 from juancarlosfarah/issue-387

Translated 05a-Multikey_Indexes-Lecture. Closes #387
Merge pull request #409 from puentesarrin/issue-396

Translated Week5-Using_-Answer. Close #396.