For the year ending 2015, you have gathered the following information about Rock Spring plc:

(a) The company undertook a £200 million share buyback programme.

(b) £300 million was invested in property, plant and equipment.

(c) Deferred revenue increased by £400 million.

(d) Corporation tax payments were £500 million.

(e) Staff redundancy payments of £50 million were made.

Label each as a source or use of cash and describe its effect on the firm’s cash balance.