(a) find an example of sets a and b such that an b = {1,2} and aub = {1,2,3,4,5).
(b) find an example of sets a and b such that a ç b and a e b.

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.