Problem 4: Python has a number of different iteration constructs. Consider this set of nested for loops that prints all fractions where the numerator and denominator are between 1 and 99 inclusive (ignoring any fancy features like reducing them to lowest terms): for x in range (1,100): for y in range (1,100) print (str (x) +"" +str(y) (a): Rewrite this to use nested while loops instead. (b): Rewrite this to use a single while True infinite loop, with all incrementing. conditional tests, and loop exit (with break) done explicitly. In other words, your solution should look like this: # initialize some variables while True: # loop body