Classify each variable as qualitative or quantitative.
a. Marital status of nurses in a hospital.
b. Time it takes to run a marathon.
c. Weights of lobsters in a tank in a restaurant.
d. Colors of automobiles in a shopping center parking lot.
e. Ounces of ice cream in a large milkshake.
f. Capacity of the NFL football stadiums.
g. Ages of people living in a personal care home.