Can someone please give me a boost on how to solve these kind of problems? Are they all solved with the same formula or do you know what they are 'called' so I can google the concept? THANK YOU!!!!!!(Wink)

If P(0<z<a)=0.3212 (a is positive), find a?

a)0.2

b)0.02

c)0.9

d)0.92

If P(-b<z<b)=0.3182 (b is positive), find b?

a)0.41

b)0.42

c)0.39

d)0.44

If P(z>c)=0.2358 (c is positive), find c?

a)0.71

b)0.70

c)0.72

d)0.27

What is the P(z>2.58)?

a)0.5194

b)0.4951

c)0.4915

d)0.0049

What is the P(0.34<z<2.67)?

a)0.4099

b)0.0863

c)0.4915

d)0.4962