Physics !

3.) chipping from the rough, a golfer sends the ball at an angle of 54° with an initial velocity of 13m/s, how far down the green did the ball go?

there are two photos attached for questions #1 and #2.

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?