How is the supply of a commodity affected by changes in the prices of other commodities?

Rise in the price of a commodity means

With a fall in the price of a commodity:

Indicate whether the following will lead to expansion, contraction, increase or decrease in supply. (i) Installation of a new machine, resulting in fall in cost of production. (ii) An increase in the price of the given commodity. (iii) An increase in wages of the employees leading to rise in cost of production. (iv) A firm deciding to maximise sales instead of profits. (v) Imposition of tax on the production of a commodity. (vi) A fall in price of a commodity whose supply curve is being considered. (vii) An increase in the prices of other commodities.

A 15 per cent rise in the prices of a commodity is 5. When price of the commodity rises from