Task 4 - Teacher with most courses

# 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(teachers):
    return len(teachers)

def num_courses(teachers):
    count = 0
    for teacher in teachers:
        count += len(teachers[teacher])
    return count

def courses(teachers):
    lists = []
    for values in teachers.values():
        lists.extend(values)
    return lists

def most_courses(teachers):
    max_count = 0
    max_teacher = ''
    for teacher, courses in teachers.values():
        if len(courses) > max_count:
            max_count = len(courses)
            max_teacher = teacher
    return max_teacher