2. Given that z is a standard normal random variable, compute the following probabilities. Round

the percents to 2 decimals, like 12.34%, except round (b) to the whole number like

12%.

(a) P(z < 1.20), the probability z is less than or equal to 1.20.

(b) P(z≥ 0.44), the probability z is at least 0.44.

(c) P(-1.57 ≤z ≤ 0.00), the probability z is between -1.57 and 0.00.