A coil is rotated in a magnetic field to generate current. The voltage generated can be modeled by a normal distribution having mean \(\mu\) and standard deviation \(0.5 \mathrm{~V}\) where \(\mu\) is the true voltage. Find the probability that voltage generated will differ from the true voltage by

(a) less than \(0.06 \mathrm{~V}\);

(b) more than \(0.085 \mathrm{~V}\).