Given the following ten samples from a normally distributed population: -0.09, 4.68, 4.10, 0.95, 1.88, 2.39, 1.15, 3.66, 4.90, 3.59. Calculate the 95% confidence interval of the population mean.
a) (1.89, 4.34)
b) (0.74, 4.23)
c) (0.89, 4.34)
d) (0.74, 4.34)