Capsule Corp wants to see if their daily sales values affect their share price (with a one-week delay). In some chosen week, the daily sales revenues were Z23m, Z4m, Z18m, Z17m, and Z25m (in millions of Zeni Z, the local currency).

The daily share prices for Capsule Corp in the following week were Z57.3, Z50.0, Z49.81, Z53.7, and Z60 (again, Z denotes Zeni).

a) What is Kendall's Tau for this given data.