Find the standard normal curve area that lies: (a) between z = -0.77 and z = 0.77; (b) to the right of z = -1.39. Find the standard normal curve area that lies (a) to the left of z = 0.27; (b) between z =1.69 and z=2.33. Find z if (a) the normal curve area between 0 and z ids 0.4484; (b) the normal curve to the left of z is 0.9868. Find z if (a) the normal curve area to the right of z is 0.8413; (b) the normal curve to area to the left of z is 0.8051.