(Identifying spontaneous, temporary, and permanent sources of financing) Classify each of the following sources of new financing as spontaneous, temporary, or permanent: a. A manufacturing firm enters into a loan agreement with its bank that calls for annual principal and interest payments spread over the next four years. b. A retail firm orders new items of inventory that are charged to the firm's trade credit. c. A trucking firm issues common stock to the public and uses the proceeds to upgrade its tractor fleet. a. A manufacturing firm enters into a loan agreement with its bank that calls for annual principal and interest payments spread over the next four years. This source of financing can be classified as a (Select from the drop-down menu.)