Below You Are Given the Values Obtained from a Random $\mu$

Below you are given the values obtained from a random sample of 4 observations taken from an infinite population.

a.Find a point estimate for $\mu$ .Is this an unbiased estimate of $\mu$ ? Explain.
b.Find a point estimate for $\sigma$ ².Is this an unbiased estimate of $\sigma$ ²? Explain.
c.Find a point estimate for $\sigma$ .
d.What can be said about the sampling distribution of $\bar{x}$ ? Be sure to discuss the expected value,the standard deviation,and the shape of the sampling distribution of $\bar{x}$

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