Seleot all answers that are TRUE about the Normal Distribution and its associated curve. I_ If a given observation has a Z-soore of exactly 0, this observation must be equal to the mean of the distribution. [_ If a given observation has a Z-soore of -1, that observation must be one standard deviation greater than the mean. I_ The total area underneath the curve equals 0.5. I- The total area underneath the normal distribution curve is l. [7 The standard normal distribution has a mean of 1 and a standard deviation of 0