Math Help, desperate immediate ten points for first complete, correct and efficient answer.?

ok I'm just having fun with your minds ok, i'm not really desperate.





Describe each set by using set builder notation / set notation


1


a) {1, 2, 4, 8, 16}


b) {121, 144, 169, 196, 225, 256, 289, 324, 400, 441, 484, 529, 576, 625}








2 write an expression using set operations ( union, intersection, subtraction)





a) the set of students in a scholl taking tutorial in at least one of the three subjects.





b)The set of students at the scholl taking both english and math but not science





c)the set of students at a school taking exactly one of the three subjects.





you are truly wise if you get all answers correct, oh and I need an answer not an explaination

Math Help, desperate immediate ten points for first complete, correct and efficient answer.?
1)


a) S = {x such that, x is the power of 2 and, 0 ≤ x ≤ 4}


b) S = (x² such that, x is a natural number and, 11 ≤ x ≤ 25}





Don't know the second question.