For the following three cases, use a midpoint formula to calculate the coefficient for the cross elasticity of demand and identify the relationship between the two goods (complement, substitute, or independent).
a) The quantity demanded for good A increases from 300 to 400 as the price of good B increases from $1 to $2. Coefficient: ___________________ Relationship: _______________________
b) The quantity demanded for good J decreases from 2000 to 1500 as the price of good K increases from $10 to $15. Coefficient:__________________ Relationship:__________________________
c) The quantity demanded for good x increases from 100 to 101 units as the price of good Y increases from $8 to $15. Coefficient: _______________ Relationship:____________________