Suppose that a researcher would like to estimate the mean daily amount (in Php) spent in online food delivery services of individuals aged 20 to 39 years old in the city of Manila. The distribution of the amount spent is said to be normally distributed with a standard deviation of Php7.50. Using a 95% confidence level and assuming that the error of the estimate is within e units, which of the following is TRUE? The number of samples that the researcher must obtain is exactly 152.21 e2 O The number of samples that the researcher must obtain is at least 216.09 e2 The number of samples that the researcher must obtain is at most 12.34 The number of samples that the researcher must obtain is exactly 14