THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Let X1,X2,X3,and X4 be a random sample of observations from a population with mean μ and variance σ2.Consider the following two point estimators of μ: 
1 = 0.10 X1 + 0.20 X2 + 0.40 X3 + 0.30 X4,and 
2 = 0.25 X1 + 0.25 X2 + 0.30 X3 + 0.20 X4
-Show that both the estimators are unbiased.
Definitions:
Provision
An amount set aside in the accounts of a company to cover a future liability or decrease in the value of an asset.
Accounts Receivable
Liabilities of customers to a firm for provisions or merchandise that have been delivered but payment is outstanding.
Capital Balance
The amount recorded in a shareholder's or partner's equity account, reflecting their investment in the business.
Full Time
Employment status characterized by working a minimum number of hours defined by the employer, typically involving benefits not offered to part-time employees.
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