<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def normalize(cls, name):
 """Return string in all lower case with spaces and question marks removed"""

        name = name.lower() # lower-case
        for _replace in [' ','-','(',')','?']:
            name = name.replace(_replace,'')
        return name