Answer:
A) 0.0618
Explanation:
Variance is given by:

Where 'Xi' is the value for each term 'i' in the sample of size 'n' and μ is the sample mean.
The mean investment return is:

The variance is:

The variance of the returns on this investment is A) 0.0618.
Answer:
$100 would be held as required reserves
$900 would be available to be given out as loans
Explanation:
The required reserve is the minimum amount set by the Central bank that must be held as reserves by banks.
If $1000 is deposited and 10% is the required reserves, 0.1 × $1000 = $100 would be held as required reserves.
$1000 - $100 = $900 would be available to be given out as loans.
I hope my answer helps you.
Answer
The answer and procedures of the exercise are attached in the following archives.
Explanation
You will find the procedures, formulas or necessary explanations in the archive attached below. If you have any question ask and I will aclare your doubts kindly.
Yes it is. This is because with no eggs being layed, then the bird population will go down. Hope my answer was useful.