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3. On a final examination in Mathematics, the mean was 76 and the standard deviation was 5. Determine the standard score of a student who received a score of 88 assuming the scores are normally distributed. 4. On a test in Statistics, the mean is 65 and the standard deviation is 3. Assuming normality, what is the standard score of a student who receives a score of 60?1. Sketch a normal curve that has a mean of 15 and a standard deviation of 4. On the same x-axis, sketch another normal curve that has a mean of 25 and standard deviation of 4. 2. Sketch a normal curve that has a mean of 40 and a standard deviation of 6. On the same x-axis, sketch another normal curve that has a mean of 60 and standard deviation of 6