Manual calculations please

Question 2. Given a standardized normal distribution (with a mean of 0 and a standard deviation of 1), what is the probability that: a. Z is between -1.58 and 1.85 b. 2 is less than -1.58 or greater than 1.85 c. What is the value of 2 if only 35 percent of all possible 2 values are larael: d. Between what two values of Z (symmetrically distributed around the mean) will 68.26 percent of all possible 2 values be contained