Determine the value of z* such that it satisfies the conditions below. (assume that the requested value of z* is positive. round your answers to two decimal places.) (a) −z* and z* separate the middle 95% of all z values from the most extreme 5%. z* = (b) −z* and z* separate the middle 90% of all z values from the most extreme 10%. z* = (c) −z* and z* separate the middle 98% of all z values from the most extreme 2%. z* = (d) −z* and z* separate the middle 92% of all z values from the most extreme 8%. z* =