Consider the following demand function for good A:

QD = 175 - 5PA - 5 PB - (0.01 - a/500) Y + 0.1 L²

Where a=4 and PA is the price of good A; PB is the price of another good, good B; Y is income; and L is time spent on leisure measured in hours. Assume PA = $5, PB = $5, Y = $20 000, and L = 20. 1.Using the point method, calculate price elasticity of demand at the current price level.

2. Is good A a normal good or inferior good?

Suppose the price of good B goes up to $6. 3. Has the demand for good A become more or less elastic? Explain all the answers in detail