Add grades.js file with array#7

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jkearns885 wants to merge 4 commits intoSummerOfCode2020:masterfrom

jkearns885:answer

Commits on Jul 23, 2020

Add grades.js file with array

Julie Kearns
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Julie Kearns
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Add grades up

Julie Kearns
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Julie Kearns
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Commits on Jul 24, 2020

Use .reduce method to add grades

Julie Kearns
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Julie Kearns
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Add console.log for reduce function

Julie Kearns
authored and
Julie Kearns
committed