. Trace each of the following Python functions and associated calls. Using the trace examples in your text as a guide, keep track of the memory and output. a. def market(r): if n0: print ("Finished marketing.") else: print ("Call 999-999 for a great value", "n = ", n) market (n -1) market (3) b. def model (n): ifn-= 1: print ("Base case, n = ", n) return 1000 else: print ("'n > 1", n-", n) return -100+ model (n -1) print (model (3))