Which one of these statements best describes the concept of form as it's used in design? a. the concept of form refers to art objects, while shape refers to furniture. b. a form is any series of three-dimensional shapes arranged in a group. c. an object's form is either inherent or derived. d. a form is a series of lines enclosing a space.

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends > a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?