Back end warm ups

Day 1:

https://www.codewars.com/kata/exclamation-marks-series-number-4-remove-all-exclamation-marks-from-sentence-but-ensure-a-exclamation-mark-at-the-end-of-string

https://www.codewars.com/kata/exclamation-marks-series-number-3-remove-all-exclamation-marks-from-sentence-except-at-the-end

Day 2: Do these again, but in the in new language!

https://www.codewars.com/kata/exclamation-marks-series-number-3-remove-all-exclamation-marks-from-sentence-except-at-the-end```

Day 3:
Work through the Koans of your language

Day 4: 
Good Morning! Today’s warm up!

Do as many as you can https://www.hackerrank.com/domains/sql