1.
Let z1(82i)1|z_1 - (8 - 2i)| \leq 1 and z2(2+6i)2|z_2 - (2 + 6i)| \leq 2, z1,z2Cz_1, z_2 \in \mathbb{C}. Then the minimum value of z1z2|z_1 - z_2| is: