Basic (2) X78225

You have to program several functions. In each case, few lines of code are enough.

1. Write a function vowel_consonant(s) that given an string s returns the number of vowels and consonants that appear as characters in s. We assume all characters of s are letters.
2. Write a function delete_digits(s) that returns the string obtained after ruling out the digit characters of s.
3. Write a function switch(s) that given an string s returns the string obtained after switching lowercase to uppercase letters and the other way around. Non letter characters do not change. Warning: do not use the swapcase string method.
4. Write a function countdown(n) that given an integer n greater than zero prints the count down until 0.
5. Write a function powers_of_2(n) that given a natural n≥ 1 prints the n first powers of 2.

Scoring

Every function counts 20 points.