"Application of the paired comparison test" - Please solve this Statistical problem using R Programming Data: Use R Studio's built-in "Iris data Set"

Command to use Iris data set: data() -> Use Iris data set using view(iris)

Note: This is a complete question. Please do not attempt if you are not confident. I do not have much credit to ask new questions :-(

For idea please see the below links:

• https://sixsigmastudyguide.com/paired-t-distribution-paired-t-test/
• https://www.youtube.com/watch?v=QPBasuWLAZg
• https://www.youtube.com/watch?v=JyLu2Dqko1s
• https://www.youtube.com/watch?v=m4o2aJ7YyZ8