Open ex_5.mxd and answer the following questions (18 pts.) a How many cities have more than (>) 400,000 people in 2000? (4 pts.) b. How many of these selected cities (from part a) are within 80 miles of a volcano? (Add the volcano feature class from the Usa\usdata geodatabase) Sort the result by NAME ascending and list the first three cities. (4 pts.) c. What are the mean and standard deviation of their (all selected cities from part b. NOT the first three cities) population in 2000? (4 pts.) d. Export the result from part b to a new shapefile and add it to the data frame. Which of these cities has the highest and lowest percentage of males in 2000. (Create a new field PERC, which is calculated as MALES/POP2000) (6 pts.) Open ex_5.mxd and answer the following questions (18 pts.) a How many cities have more than (>) 400,000 people in 2000? (4 pts.) b. How many of these selected cities (from part a) are within 80 miles of a volcano? (Add the volcano feature class from the Usa\usdata geodatabase) Sort the result by NAME ascending and list the first three cities. (4 pts.) c. What are the mean and standard deviation of their (all selected cities from part b. NOT the first three cities) population in 2000? (4 pts.) d. Export the result from part b to a new shapefile and add it to the data frame. Which of these cities has the highest and lowest percentage of males in 2000. (Create a new field PERC, which is calculated as MALES/POP2000) (6 pts.)