use the demand function below to answer the questions that follow where P y and P z are prices of related goods and M is income. using the demand function: Q dx = 3/4 - 1/3P x - 5P y + 2P z - 2/10M...

use the demand function below to answer the questions that follow

where P_{y and}
P_z
are prices of related goods and M is income. using  the demand  function: Q_dx
= 3/4 - 1/3P_x
- 5P_y+ 2P_z- 2/10M

where P_yand P_{z are  prices of related goods and M is income. Using the demand function;}

_{(a) identify which type  of goods is}P<sub>z

and explain it</sub>

_{(b) identify which type of good is M and expalin it}

_{(c ) identify which type of good is Py and explain it and interpret}
P_x