Multiple$-$Choice Questions

$2\mathrm{.}1$ What is the seasonal component of a time series? $(1)$

$($a$)$ The long$-$term trend

$($b$)$ The random noise

$($c$)$ The systematic pattern that repeats at regular intervals

$($d$)$ The irregular fluctuations

$2\mathrm{.}2$ Which of the following properties form the linear programming model? $(1)$

$($a$)$ Relationship among decision variables must be linear in nature.

$($b$)$ A model must have an objective function.

$($c$)$ Resource constraints are essential

$($d$)$ All of the above

Question $2$

Column A$7$