Answer:
a) 14.927
b) 14.155
Step-by-step explanation:
You seem to have correctly determined that the mean should be set 3.09 standard deviations above the target fill value. The target value is 14 ounces, not 12.
a) the mean needs to be 14 + 3.09·0.3 = 14.927 . . . fl oz
__
b) the mean needs to be 14 + 3.09·0.05 = 14.155 . . . fl oz