A consumer consumes good 'X'. Explain the effects of all in the prices of related goods on the demand of 'X'. Use diagrams showing demand for good 'X' on the x-axis and is price on y-axis.

A consumer consumes good 'X'. Explain the effect of fall in the prices of related goods on the demand of "X". Use diagrams showing demand for good "X" on the x-axis and its price on y-axis.

If due to fall in the price of good X, demand for good Y rises, the two goods are :