Gauss Law Questions

A hollow metal sphere of radius $R$ is uniformly charged. The electric field due to the sphere at a distance $r$ from the centre:

Two parallel infinite line charges with linear charge densities $+\lambda \text{C/m}$ and $-\lambda \text{C/m}$ are placed at a distance of $2R$ in free space. What is the electric field mid-way between the two line charges?

A sphere encloses an electric dipole with charges $\pm 3\times 10^{-6}\text{C}$. What is the total electric flux through the sphere?