In each of the following cases, compute 95 percent, 98 percent, and 99 percent confidence intervals for the population proportion p (round answers to 3 decimal spaces). Show your use of the formula for each problem and how you worked through each one.

1. p= .5 and n = 94
2. p= .4 and n = 347.
3. p= .7 and n = 141.
4. p= .8 and n = 64.