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Which of the following are Well ordered set

$\left [ Z^{+},\leq \right ]$

$\left [ Z^{-},\leq \right ]$

$\left [ Z^{+},\geq \right ]$

$\left [ Z^{-},\geq \right ]$
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z+= 1,2,3,4,5,6....

if orderd then 1 should be related to 2 and 2 should be related to 3 so on in ordered fashion. so,

only one possibility is 1<=2<=3<=4.....

similarly for z- we have -1>= -2>= -3.......

hence ans. should be (z+,<=) and z-(>=).

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