Strings - General Questions

What is the output of the following code?

print('-'.join(['2026', '10', '17']))

Strings in Python are:

What is the output of the following code?

print('hello world'.title().swapcase())

What is the output of the following code?

s = 'abc'
try:
    s[0] = 'z'
except TypeError:
    print('immutable')

What is the output of the following code?

s = 'hello world'
print(s.title(), s.upper().count('L'))