4. Which of the following equations is incorrect? A. (-21) + (+12) = 9 C. (-7).(-21) = -147 B. (-21)-(+21) = 0 D. (-123) - (+3) = -41 5. Find the product of the following integers: (-3)(-2)(-4)(-5)(-6) = A.-702 B. -720 C. 702 D.720 6. Which of the following statements is true? A. The sum of two negative integers is a negative integer. B. To find the difference of two positive integers is always positive C. The product of two integers having different signs is a positiv D. The quotient of two integers having the same sign is a negativ integer. 7 Michael went on the grounds to fly his kite. Initially, his k ime his kite descended 14 meters. It has be his kite ascended​