Determine the area under the standard normal curve that lies to the left of (a) upper z equals negative 1.45 commaz=−1.45, (b) upper z equals 0.63z=0.63, (c) upper z equals 1.48z=1.48, and(d) upper z equals negative 1.37z=−1.37. click the icon to view a table of areas under the normal curve. (a) the area to the left of zequals=negative 1.45−1.45 is nothing. (round to four decimal places as needed.)