Can you explain this question. I get confused by the symbols.

1. Let X1,X2, X3, X4, X5 5'5 Boom. Supposed we observe the following values: 0.2, 3.4, 1.2, 6.1, 5.3. We want to calculate an estimate of the parameter A. We can go out it with the following steps: a We know X' is an unbiased estimator for ]E(X). c Find lE(X), set X equal to it, and solve for A. I Thus we will now have an unbiased estimator for A. I Plug in your data values into your estimator and that will yield the numerical estimate. Use this process and give the numerical estimate of A. Explicitly show what your estimator is rst. (6 points)