A study is planned to be conducted to verify what proportion of customers upgrade their internet account. A preliminary sample was taken that showed the proportion of customers upgrading was 0.5. This proporiton was used as a planning value. With this planning value, what sample size must now be taken for the 95% confidence interval to have the margin of error of 0.04? Use the fact that 95% of normally distributed observations are within 1.96 standard deviaitons.Gve your answer with 2 decimals.DoNOTround the sampe size to a whole number. For example, if you obtain 456.76 for the sample size, enter this value, not 457.