Let f be defined over R :{0 ≤ x ≤ 1 , 0 ≤ y ≤ 1} by

f(x,y) = 1 if x in irrational
3y^2 if x is rational


Show the following
(1) f is not integracle over R.
(2) The other iterated integral does not exist.

Please Help~~