48) which sets are compact? x {|r> 2} cr y=a,)er |r*+ =1{ z=,y) er?1 + 9 -1} [question id = 24532] 1. all of x, y and z [option id 38126] 2. only y and z [optio

48) Which sets are compact? X {|r> 2} CR Y=a,)ER |r*+ =1{ Z=,y) eR?1 + 9 -1} [Question ID = 24532] 1. All of X, Y and Z [Option ID 38126] 2. Only Y and Z [Option ID 38127] 3. Only X and Z [Option ID = 38128] 4. Only Z [Option ID = 38129] e