I have two questions which I am unsure how to answer.

"The rule of thumb for SDs tells us that the area under the normal curve between -z=-2 and z=2 is about 95%.

Using this approximation, what is the total area under the normal curve to the left of z=2?"

a)90%

b)92.5%

c)95%

d)97.5%

"Suppose a collection of heights has an average value of 65 inches and an SD of 5 inches.

How tall is someone whose height is 0.4 SDs below average?"

a)60 inches

b)62 inches

c)63 inches

d)65 inches