Please refer to the following table:
Number of Cellular Phones in Household:
DECILE
1 - 1.00
2 - 1.00
3 - 1.00
4 - 1.00
5 - 2.00
6 - 2.00
7 - 3.00
8 - 3.00
9 - 4.00
(a) How many cellular phones does a household have at the 42nd percentile?
(b) How many cellular phones does a household have at the 3rd quartile?
(c)90 percent of respondents have ______ cellular phones or fewer.