How do you think an environment and weather of a country can affect the population and people of a region

Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?

Could someone . i have tried to solve myself but my calculation is off

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?