Answer 1

It is speling problem, your first Println is written with capital i not with lowercase L
To remember better it is short for print line, thats why it is "ln" at end

If you remove first print statement code will work, this 2 letters look same in most fonts

Answer 2

It work for me:
Check comments

https://code.sololearn.com/cLtnQg3ZcA1I/?ref=app