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

5. James and Naomi got tossed out of a space station, so they are translating through space together with vo = -4.0i m/s relative to the space station. To not drift to their deaths in the darkness of space, Naomi (60 kg) kicks off of James (75 kg) to try and reach a still opened space station door that is at location door = (301 - 15)) m relative to them. Naomi wants to get to the door in 5.0 s before it closes and locks. VO Space station door a. After Naomi kicks off of James, what is the velocity of Naomi? b. After Naomi kicks off of James, what is the velocity of James? Bonus1: To not abandon James, Naomi attaches a string to James before kicking off. What length of string is needed so Naomi can make it to the door without James tugging her back? Bonus2: When Naomi kicks off of James, why must she take care that the kicking force acts through both their centers of mass