Answer Happy

The steps for (C) that I worked through look something like:
Seeing other people's approach to this is greatly
appreciated!
An astronaut finds themselves in a formfitting space suit at rest out in the vacuum of space. There are no forces acting on the astronaut and no external masses. Seated atop the airtight suit are a pair of removable space boots. The combined weight of the suit sans boots and the person inside the suit back on Earth is 180 lbs. The space boots are similar to snowboard boots known to weigh 6 to 8 pounds on Earth. The astronaut mentally averages to find the mass. Firmly affixed and wrapped around the two boots are 1m long laces within grabbing range of the astronaut The astronaut recalls during training having a pull strength of 200N both in a seated and standing position in the suit. If the Astronaut pulls the loose strings straight upwards along the axis from the top of the feet towards the crown of the head... A) Is it possible for the astronaut to pull themselves up by their bootstraps and apply a force to acquire a velocity from rest? (Draw a free body diagram and explain how this is or isn't possible in several paragraphs). B) Using the free body diagram, kinematics, Newton's laws, momentum, and/or conservation of energy show the mathematics of how this is or isn't possible. C) If the collision between the boots being pulled by the string contacting the bottom of the foot is elastic would that change anything? (show all work) D) If the collision between the boots contacting the bottom of the foot is inelastic would that change anything? (show all work) E) What is the maximum velocity in miles per hour the astronaut can achieve from rest using the boots in each of the above scenarios? F) Is there an alternate scenario where the person could gain a velocity? If so how, show all work.