Which sentence can represent the inequality startfraction n over 4. 2 endfraction less-than-or-equal-to 21? the quotient of a number and 4. 2 is less than or equal to 21. The quotient of a number and 4. 2 is less than 21. The quotient of 4. 2 and a number is less than or equal to 21. The quotient of 4. 2 and a number is less than 21.