An electrical contractor's records during the last five weeks indicate the number of job requests: Predict the number of requests for week 6 using each of these methods: (a) Naive (b) A Four-period moving average (c) Weighted moving average using 0.50 for week 5,0.30 for week 4 , and 0.20 for week 3 . Problem 2: (4 Points) A company has developed a linear trend equation that can be used to predict annual sales of its product. Ft=100+12t where - Ft= Annual sales - t is in years (a). Are annual sales increasing or decreasing? By how much? (b). Predict annual sales for year 5 using the equation