Please help 6,7,8 not sure how to do thanks a lot

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secondary 2 | Science
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secondary 2 Science

Please help 6,7,8 not sure how to do thanks a lot

Date Posted: 7 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Hope this helps (:

Date Posted: 7 years ago