(a)\(\displaystyle\overbrace{{{p}}}={0.4497},\overbrace{{{q}}}={0.5503}\)

(b)90% confidence interval: (0.4239, 0.4755)

95% confidence interval: (0.4189, 0.4805)

(c)The 95% confidence interval is wider than the 90% confidence interval.

(b)90% confidence interval: (0.4239, 0.4755)

95% confidence interval: (0.4189, 0.4805)

(c)The 95% confidence interval is wider than the 90% confidence interval.