please help quickly thank you!!

20. In ARST, the values of s and 27 are known. What additional information is required to use the sine law to determine r? [1] 21. Solve for the unknown side length. Round your answer to one decimal place. [1] 8.0 sin 170 sin 750 22. Determine the measure of O to the nearest degree. [2] 50 5.2 54' 5.4 23. In a triangle, angle X is thirty six degrees, angle Y is 70 degrees and the side opposite of angle X is 14.1 cm. Sketch and label a diagram and determine the measure of side y to the nearest tenth of a centimetre. [3] 24. A triangle has side lengths of 21 and 19.4 with the angle in between these side of 85 degrees. Determine the length of the missing side, to the nearest tenth. [2]