1) (p>0) and (q>0)
2) (p>0) or (q>0)
3) (p<0) and (q<0)
4) (p<0) or (q<0)
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Answers & Comments
1) (p>0) and (q>0)
2) (p>0) or (q>0)
3) (p<0) and (q<0)
4) (p<0) or (q<0)