(a)\(\displaystyle\overbrace{{{p}}}={0.3351},\overbrace{{{q}}}={0.6649}\)

(b)90% confidence interval: (0.3186, 0.3516)

95% confidence interval: (0.3155, 0.3547)

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

(b)90% confidence interval: (0.3186, 0.3516)

95% confidence interval: (0.3155, 0.3547)

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