2 (a) Define aggregate planning.. (b) Fairview Industries is preparing its aggregate plan for the second half of the year. The table below contains monthly demand estimates and working days per month. Complete the table by computing total demand, demand per day (for each month), and the average requirement (in units per day) over the six-month planning. Demand per Day Month July August September October November December TOTAL Expected Demand 1800 2100 1750 1250 1200 1350 Production Days 20 23 21 21 20 21 Plot Daily and average demand to show the nature of the aggregate planning. 3. Compare the Reliability of the two Systems R1|R2|R3 0.7 0.95 0.91 Rs1 R1 R2 R3 0.7 0.9 D 0.7 0.95 0.9 Rs2