Fill in the blanks with acute, obtuse,right or straight :(a) An angle whose measure is less than that of a right angle is______.(b) An angle whose measure is greater than that of a right angle is ______.(c) An angle whose measure is the sum of the measures of two right anglesis _____.(d) When the sum of the measures of two angles is that of a right angle, then each one of them is ______.(e) When the sum of the measures of two angles is that of a straight angle and if one of them is acute then the other should be _______.