What would it mean for this subtest to be reliable? What would it mean for it to

What would it mean for this subtest to be reliable? What would it mean for it to

What would it mean for this subtest to be reliable? What would it mean for it to be valid? What would be the relationship between reliability and validity on this subtest?
Copy the table of these results into the document. Choose the results for one of the columns and explain what the results mean for that item.
What is the split-half reliability and what does it mean for this subtest? What is the coefficient reliability and what does it mean for this subtest? How could the item-total correlations be used to make the test more reliable?
What is the criterion validity coefficient? What does the criterion validity mean in this case?
What is the construct validity coefficient? What does the construct validity mean in this case?
No sources of references please all the material is attached with excel of the assignment and the instructions as well