Add warmup exercise 21
Update series product warmup
Merge branch 'master' of https://github.com/JumpstartLab/warmup-exercises
Add warmup
Merge branch 'master' of https://github.com/JumpstartLab/warmup-exercises
Add code example
Fix require statement
Add missing skip
gentlemans stab at product
Add final 'say' warmup
Remove extension on warmup 23
merge2