I don´t understand how i'm supposed to do this task.

# The dictionary will look something like:
# {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'],
#  'Kenneth Love': ['Python Basics', 'Python Collections']}
#
# Each key will be a Teacher and the value will be a list of courses.
#
# Your code goes below here.
def num_teachers(dict):
    count = 0
    for key in dict.keys():
        count += 1
    return count

def num_courses(dict):
    count = 0
    for value in dict.values():
        count += len(value)
    return count

def courses(dict):
    names = []
    for value in dict.values():
        names.append(value)
    names = sum(names, [])
    return names

def most_courses(dict):