What is subtracting fractions from mixed numbers for grade 4

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

Use multiples to write two fractions equivalent to 7/9. 14/18, 8/10 6/8, 21/27 10/12, 28/36 14/18, 21/27