Determine the total area under the standard normal curve for parts (a) through (c) below. For each, be sure to draw a standard normal curve and shade the area that is to be found. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). O Click here to view graph c. Click here to view graph a. ClIck here to view graph d) Click here to view graph b. The total area under the standard normal curve to the left of z = - 1 or to the right of z = 1 is. (Round to four decimal places as needed.)

Please answer all the parts

Please answer the question on the attachment.

1.  Find the area of the shaded region. The graph to the right depicts IQ scores of​ adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15.   Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING...                 75         A graph with a bell-shaped curve, divided into 2 regions by a vertical line. The vertical line extends from the bell curve to the x-axis, and is located on the left half, under the curve. The region on the left of this line is shaded. The x-axis below the vertical line is labeled 75.     2.  Find the area of the shaded region. The graph to the right depicts IQ scores of​ adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15.                     83         A symmetric bell-shaped curve is plotted over a horizontal scale. A vertical line runs from the scale to the curve at labeled…