In 2006, 20% of households received a long census form with 53 questions. The remainder received a short census form with only 8 questions. In 2006, Canada tried something no other country had ever tried; census questionnaires that could be completed online. Fifteen percent of households received the short form and completed the census online; 4% of households received the long form and completed their census online.

a. What percent of households received the short form?

b. What percent of households did not file online?

c. What percent of households received the long form or filed online?

d. What percent of households received the long form and did not file online?