HI canyou help me w my homework for Probability and Statics. Thanks!

Normal distribution / To solve the problem you must use table appendix 11.

Find the area under the normal curve in the following cases.

a) Between z= 0.81 and z= 1.94

b) To the right of z= -1.28

c) To the right of z= 2.05 or to the left of z= -1.44

Appendix 11 Areas under the standard normal curve, from o to z