Indicate whether it would appear on the statement of cash flows as a(n): operating activity, investing activity, or financing activity.

a. Cash receipts from customers. choose a type of business activity
b. Issuance of common stock for cash. choose a type of business activity
c. Payment of cash dividends. choose a type of business activity
d. Cash purchase of equipment. choose a type of business activity
e. Cash payments to suppliers. choose a type of business activity
f. Sale of old machine for cash. choose a type of business activity