CelestialMechanicsLabActivityAnswerSheet

First – You have to download Classaction v2.3.pkg  from this link 
https://astro.unl.edu/nativeapps/
this will help you to answer the question
Second – Read the PDF file and you will see 17 questions to answer those you need to go back the classaction and you will see 
Third – you have to answer those 17 question in word answersheet that I provided for you.