Please help solve part a/b

Part A A 50-cm-long spring is suspended from the ceiling. A 410 g mass is connected to the end and held at rest with the spring unstretched. The mass is What is the spring constant? released and falls, stretching the spring by 30 cm Express your answer with the appropriate units. before coming to rest at its lowest point. It then continues to oscillate vertically. O K = Value Units Submit Request Answer Part B What is the amplitude of the oscillation? Express your answer with the appropriate units