What wrong in the format specifier?

Question

https://code.sololearn.com/cV9UXOnT0CYL/?ref=app

Answer 1

1. replace "format." with ".format"
2. replace "{ }" with "{}"

https://code.sololearn.com/cwgE8Hyjfy8P/?ref=app

Answer 2

https://code.sololearn.com/cVHLUTskLEyc/?ref=app

Make sure that syntax of "format()" is correct