I am doing a problem with calculating orbits. The orbit can be expressed in polar coordinates as r=p/(1-ecos(theta)) where r and theta are the distance and angle of the satellite from the center of the earth, p is a paremter where p=1200 km, and e is a parameter representing eccentricity. I'm supposed to write a program to calculate the distance of the satellite from the earth as a function of theta if the satellite has an eccentrity of 0, .25, .5, .75, and 1. Write the program to input values of e and theta. Here is what I have done: program calculating_orbits implicit none real :: r !distance of the satellite from the center of the earth real :: theta !angle of the satellite from the center of the earth real, parameter :: p=1200 !parameter specifying the size of the orbit real :: e !parameter specifying the eccentricity of the orbit write (*,*) 'This program accepts inputs of theta and e and outputs the + value of r=p/(1-e*cos(theta)).' write (*,*) 'This program will run until a number not in the domain + is inputted.' do write (*,*) 'Please input a real number.' read (*,*) e read (*,*) theta Now I get stuck. Any hints?