Samantha is planning to sell sunglasses from portable huts on the beach. However, she lacks funding and needs to put together a business plan. Which one of the following should be the most important ?consideration for Samantha if she is trying to decide what cost of capital she should use for her project Use, or lack, of preferred stock to finance the project Amount of debt used to finance the project Risk level of the project Length of the project's life Mix of funds used to finance the project