Give reasons and categorise the following into stock and flow

Give reasons and categorise the following into stock and flow
(i) Capital (ii) Saving
(iii) Gross Domestic Product (iv) Wealth

(i). Capital It is a man-made means of production.It is a stock because it is measured at a given point of time.
(ii) Saving It is the surplus of production over consumption. It is a flow as it is measured during a period of time.
(iii) Gross Domestic Product It is a flow as it is the market value of final goods and services produced within the domestic territory measured during a period of time.
(iv) Wealth It is’a stock as it is measured at a particular point of time.