The prices of children talking books in dollars ($) follow a normal distribution as shown below. Use the graph below to answer questions a through d; remember units as appropriate. | l 7.05 8.20 9.35 10.50 \".65 mm \".95 l .3 .z ~l a I z 3 a a. What is the mean price of all children talking books? b. What is the standard deviation for the price of all children talking books? 0. What does \"x" the continous random variable, represent in this problem? d. What percentage of the children talking books have a price exceeding $10.50