e graph below.

Actual Demand for a product over $24$ months

$800$

$700$

$600$

$500$

$400$

$300$

$200$

$100$

$0$

$642$

$480494524$

$437$

$310$

$210$

$9374$

$112$

$690710712746724738734720716$

$670$

$156$

$0$

$615595$

$123456789101112131415161718192021222324$

$1.$ Using period $3$ to $10,$ develop a regression for forecast. Check accuracy of the forecasting

equation for period $11$ to $16.$

$2.$ Using period $19$ to $24,$ develop a forecast for period $25.$

$3.$ Explain the demand pattern in the context of product life cycle.