Pls I need help for the problem solving part.

3. which is not a primary color of light? blue red green yellow

Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2 . how much is the spring compressed x from its natural length?

What is the volume of 2400kg of gasoline (petrol) if the density of petrol is 0.7g/km3