Geocentric system of the universe

  Please answer these questions in paragraph form using my included article, and outside sources. Please paraphrase instead of quotation marks. Please make it about 800 words long.   

a) The philosophical foundations of geocentric astronomy
b) Aristarchus’s model, and the reason that ancient and medieval scholars
rejected Aristarchus’s model
c) The foundation and elements of Ptolemy’s geocentric model. To answer what
questions Ptolemy introduced those elements in his geocentric model?
d) The problem of a point called equant