Ok, so I give in. I have no clue how to do this. Can anybody help?? I would love a step-by-step explanation of how to find the answers....

The length of elephant pregnancies from conception to birth varies according to a distribution that is approx. normal with mean 525 days and standard deviation 32 days.

What % of pregnancies last more than 600 days?

What % of pregnancies last between 510 and 540 days?

How short do the shortest 10% of all pregnancies last?

Thank you in advance!!!!!