How do I solve this problem?

Solve the problem. A variable x has the possible observations shown below. Possible observations of x: -3 -1 0 1 1 2 4 45 Find the z-score corresponding to an observed value of x of 4. Round the values of u and o to one decimal place. Round your final answer to two decimal places. 1.04 1.00 O -1.04 O -1.00