State the research problems for each of the following management decision problems.

a. Sales leads have fallen in targeted email marketing campaigns.

b. Legislative changes have resulted in the reduction of certain product ingredients. Consequently, the product will need a new launch campaign.

c. Competitors have slashed prices and have captured market share from the business.

d. Sales employees in a store have been less effective in stimulating sales during the past three months.

e. Sales of products at the end of aisles in a food supermarket have dropped by 20 percent.