3. Suggested phases

• Start with a program to output a circle. Display using the ez2gs.exe program, as above.

• Add commands to do 3, 4(a), 4(b) and to write out the Cartesian coordinates. Display results.

• Remove the writes and add 4(c), 4(d), 4(e), 4(f), using the identity matrix for R, so that you are looking from above the north pole. Display results.

• Add the calculation of arbitrary R as in 2, 3. Display results.