Semiconductor - how to find k and energy of electron, hole

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Ags Ivana
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Homework Statement


upload_2016-12-7_10-35-42.png

upload_2016-12-7_10-36-12.png

This is what the question looks like and I don't even have an idea where to begin since we didn't really cover this during lectures.

Homework Equations


This is all I have from my notes:
upload_2016-12-7_10-38-52.png

upload_2016-12-7_10-37-31.png

also I found that Eg=Ec-Ev

Any help appreciated
Thanks
 
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