Suppose the gain from an investment is a normal random variable with mean $10 and standard deviation $1.25. Compute the Variance for this investment.

2). Define the c%-Variance to be the value |v| such that there is only a c% chance that the loss from an investment will be greater than c.

a). Derive a formula for 5%-Variance on an investment with gain G that is normally distributed with mean and standard deviation .

b). If G has mean =15 and =1.8, compute the 5%-Variance on this investment 3). Investment A yields a gain that is normally distributed with mean 24 and standard deviation 4.5. Investment B yields a gain that is normally distributed with mean 23 and standard deviation 3.9. Which investment is better in terms of Variance?

Can I get help with these two questions please? This is the third times that I submit this problem.