Python

Derse girmediğim için yapamadığım bir bölüm var. Arkadaşlar bu konuda yardımcı olacak yapabilecek veya yardım edebilecek birisi var mıdır?

#Q1
def find_sumOfDigits( number ):
 total = 0
 while number > 0:
  total = total + ( number % 10 )
  number = number / 10
 return total
def call_findFunction():
 number = 0
 while number >= 0:
  number = int(raw_input("Enter a number: "))
  if number >=0 : print find_sumOfDigits( number )

call_findFunction()

#Q2
def print_Speed( speed ):
    if speed == "stop": return ""
    speed = int(speed)
    if speed > 90: return "Speed > 90, very fast"
    elif speed > 70: return "Speed > 70, fast"
    elif speed > 50: return "Speed > 50, medium"
    elif speed > 30: return "Speed > 30, slow"
    elif speed >= 10: return "Speed > 10, very slow"
    else: return "Speed < 10, very very slow :)"

speed = -1
while speed != "stop":
    speed = raw_input("Enter the speed of a car (in km/h): ")
    print print_Speed( speed )