To work optimally, brainstorming sessions should ________. allow plenty of extra time to discuss each idea generated encourage participants to build upon ideas keep the number of ideas down to fewer than seven encourage each team member to critique every suggestion offered during the sessionTrend charts provide ________. a series of vertical bars whose height represents the values of an item of data a great deal of added effort to collect a graphical representation of information captured at regular intervals over a specific span of time data that can be used by designers to see which items of inventory are most in demand