Which оf the fоllоwing business аctivities аre considered investing аctivities? I. Selling a delivery van used by Bucky's Bakery. II. Purchasing 500 shares of stock in a competitor, Cardinal Outfitters. III. Collecting $800 from a student for tutoring services at Helen C. White Library. IV. Collecting money from the sale of a long-term warehouse facility on Regent Street.