Question 1170425
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1.   There is a  RULE,  a  POLICY  and the  REQUIREMENT  at this forum:


<H2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;One and ONLY ONE problem/question per post.</H2>


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2. &nbsp;&nbsp;The formulas in parts &nbsp;(b) &nbsp;and &nbsp;(c) &nbsp;are &nbsp;UNREADABLE, &nbsp;because they are presented &nbsp;INCORRECTLY.