2. Is diet or exercise effective in combating insomnia? Some believe that cutting out desserts can help alleviate the problem, while others recommend exercise. Forty volunteers suffering from insomnia agreed to participate in a month-long test. Half were randomly assigned to a special no-dessert diet; the others continued desserts as usual. Half of the people in each of these groups were randomly assigned to an exercise program, while the others did not exercise. Those who ate no desserts and engaged in exercise showed the most improvements. a) Type of experimental design? b) Was blocking used? If so, blocked on what variable? c) Experimental units? d) Factor(s) and levels? e) Treatments and treatment groups? f) Response variable? g) Could single or double blinding have been implemented? Why or why not? h) How was randomization & replication used