An interactive poll found that 386 of 2,262 adults aged 18 or older have at least 1 tattoo.

a) Obtain a point estimate for the proportion of adults who have at least 2 tattoos.

b)Construct a 90% confidence interval for the proportion of adults with at least 1 tattoo.

c) Construct a 98% confidence interval for the proportion of adults with at least 1 tattoo.

d) What is the effect of increasing the level of confidence on the width of the interval.