Write code that uses turtle graphics to draw an equilateral triangle, a square and a regular pentagon, each with side length 100. 1. 2. Write code that uses turtle graphics to draw four concentric circles of radius 50, 100, 150 and 200. 3. Write code that uses the Python math module to compute and print out the values of a. 100! b. the log (base 2) of 1,000,000 c. the greatest common denominator of 63 and 49