solving the problem and explan the process please.

36. There are five binary decision variables 11, 12, 13, 14 and 15 for selection of items. Formulate the following logical requirements to linear constraints. You may define additional decision variables if necessary. (a) (2 points) More than three items should be selected. (b) (2 points) Item 5 cannot be selected if both of items 1 and 2 are selected. (c) (2 points) The number of items selected should be even (0, 2, or 4). (d) (2 points) Item 1 and 2 should be selected together if any is selected