Explain me this Python code pls

Question

https://www.sololearn.com/post/621988/?ref=app

Answer 1

d = sorted("cda") =>results list as d = ['a', 'c', 'd' ]

a, b, c = d means => a= d[0], b = d[1], c =d[2] => so now a='a' ,b='c', c='d'

d = c, b, a so now => d[0] =c , d[1] = b, d[2] =a =>hence
d =['d','c','a']

print("". join(d)) => prints "dca"

Answer 2

1. d is assigned to ['a', 'b', 'c'] (sorted() will sort the elements in ascending order, returning a list)
2. a is assigned, to d[0] b to d[1], c to d[2]
3. d is assigned to c, b, a(tuple) so d = (c, b, a)
4. A string is printed, consisting of the elements of d, joined by "" (nothing), so the string is "cba"