Kinetic theory of gases — practice question

At room temperature, a gas sample contains five atoms with speeds: $1.32 \times 10^3\,\text{m s}^{-1}$, $1.50 \times 10^3\,\text{m s}^{-1}$, $1.46 \times 10^3\,\text{m s}^{-1}$, $1.28 \times 10^3\,\text{m s}^{-1}$, $1.64 \times 10^3\,\text{m s}^{-1}$. For these five atoms, calculate, to three significant figures,