Challenge: Tidying Data with tidyr

In this challenge, you will practice reshaping and tidying a dataset using tidyr functions. You will convert the dataset to long format with pivot_longer(), and then split a combined column into two separate columns using separate().

• Use pivot_longer() to convert the score columns into a long format, creating a column named subject_year and a column named score.
• Use separate() to split the subject_year column into two columns: subject and year.