Which of the following should be placed in the blank spaces respectively (in the same order from left to right) in order to complete the given expression in such a manner that “ P ≤ A ” definitely holds True?
N __ Z ≥ P = K; N ≤ U __ A1
≥, <
2
<, <
3
>, ≤
4
≥, ≤
5
None of these