Please show all steps for better understanding! Thank you in advance

3. Mario (m = 100 kg) jumps up at 4.0 m/s from a 6.0 m stage onto a massless spring- loaded platform, and then bounce up again to the other side. The spring is initially undeformed with a length of 4.0 m and have a spring constant of 1500 N/m. a. How long is the spring when Mario reaches the lowest point on the platform? b. Does Mario make it to the other side? If so, with what speed does he land onto the 10 m stage? 10 m 6 m um 4 m