Please help! It’s urgent

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

For those who need theses answers i just took the test and got everyone of them