R Studio Problems:

Data wrangling using the tidyverse (classwork problems)

Load the nycflights13 library (will have to install the nycflights13 package first) which contains flight arrival and departure data in a table called flights. Apply the tidyverses data wrangling verbs to answer these questions. For each question, give only the (one line) code.

1) Show the average total delay (excluding NA values) for every origin city.

2)Show the average total delay (excluding NA values) for every origin-destination city pair.