Sir i am stuck for this question

.3. Which one of the following components in a time series best describes the negative impact of COVID- 19 (an unusual wide spread virus disease) to the economy of Hong Kong since 2019? Long term trend Seasonal variation Cyclical variation Irregular variation POP\"? .4. An approximate linear trend of the sales of a mini-store is represented by the equation: y = 20(t) 13 where y (in $ thousand} is the sales in a year and t is the number of years. Which one of the following is the expected trend sales (y) in the 5'h year (t = 5)? A. $30 thousands B. $33 thousands C. $37 thousands D. $1 13 thousands