Feasibility of dual programs

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I am having trouble understanding the feasibility of dual programs. I am new in this topic and some help would be greatly appreciated :))

For example , here i have two problems in duality :

The primal (P) which is

max 1 + 32

1 + 22≤ 7

x≥0

and the dual (D) which is

min 7

≥1

2≥3

≥0.

On the answer sheet it states that x=(0,0) fulfills the constraints of the primal problem and =2 satisfies the dual constraint, so both problems are feasible.

Couldn't y=3 satisfy the dual constraint ?

I do not really understand this answer. Where are the x=(0,0) and the =2 coming from and how are they linked to feasibility ?

Thanks for the help guys !