A) A study is to be carried out to determine the effects on beach erosion of aspect (the direction the beach faces) and density of vegetation on the sand dunes. The variable to be measured is the volume of sand 10\" in a prescribed area over one month. The levels of the two factors have been determined as: aspect: north or sour vegetation density: nil, low, medium, dense ('3) List in standard order the treatments that will be needed. (ii) Determine how many replicates will be necessary to give a valid analysis remember the rule of thumb given in lectures for the minimum error degrees of freedom. (iii) Give the projected preliminary and projected factorial analysis of variance tables (mes of variation and their degreea of freedom}