The national asphalt pavement association (napa) announced that staker and parson companies won its community involvement award for "rocks build our world", an outreach program for elementary schools. the rocks build our world program includes both group tours of the company's corporate office facility and classroom visits targeted to fourth graders. the classroom visits start with some basic information on geology, mining methods and the uses of minerals in every day life. this is an example of:
a. press agentry
b. sales promotion
c. community involvement
d. societal advertising
e. advocacy advertising

Suppose that two firms produce differentiated products and compete in prices. as in class, the two firms are located at two ends of a line one mile apart. consumers are evenly distributed along the line. the firms have identical marginal cost, $60. firm b produces a product with value $110 to consumers. firm a (located at 0 on the unit line) produces a higher quality product with value $120 to consumers. the cost of travel are directly related to the distance a consumer travels to purchase a good. if a consumerhas to travel a mile to purchase a good, the incur a cost of $20. if they have to travel x fraction of a mile, they incur a cost of $20x. (a) write down the expressions for how much a consumer at location d would value the products sold by firms a and b, if they set prices p_{a} and p_{b} ? (b) based on your expressions in (a), how much will be demanded from each firm if prices p_{a} and p_{b} are set? (c) what are the nash equilibrium prices?