1) Define the different between linear and nonlinear optimization with example each?

2)

A- How to calculate forecast error?

B- Calculate forecast error for December?

Month

Sales

Forecast

Error

September

5500

3000

---

October

7200

4150

---

November

8600

9100

---

December

9300

7900

3)

A- How to calculate forecast weighted moving average?

B- Apply forecast weighted moving average formula

(n = 2, W1 = 0.5, W2 = 0.8)

Week

Demand

1

7000

2

4000

3

3000

4

5000