No new skills here: just the everyday functions on a fresh sheet, mixed so you have to pick the right one each time. Each answer goes in the cell named in the task. Read the question twice and look at the data before you write the formula: some columns have blanks and text in them on purpose.
Remember the differences: COUNT counts numbers, COUNTA counts anything that isn't empty, COUNTBLANK counts empty cells, and AVERAGE skips blanks but counts zeros.