If A={x:x2−4≤0,x∈Z} and B={y:y2−9≥0,y∈Z}, then n(A∩B) is equal to

If A={x:x2−4≤0,x∈Z} and B={y:y2−9≥0,y∈Z}, then n(A∩B) is

1.	If A={x:x2−4≤0,x∈Z} and B={y:y2−9≥0,y∈Z}, then n(A∩B) is equal to
Answer» If $A = {x : x^{2} - 4 \leq 0, x \in Z}$ and $B = {y : y^{2} - 9 \geq 0, y \in Z}$ , then $n (A \cap B)$ is equal to