Please help me

Consider an asset that had the historical average annual return of 5.60% and the standard deviation of returns of 10.30%. Assume the returns are normally distributed

What is the approximate probability that your return on this asset will be less than -2.5% in a given year?

What range of returns would you expect to see 95% of the time?

What range would you expect to see 99.7% of the time? (This is equivalent to +/- 3 standard deviations).