Human Resource. Please answer correctly, thank you!!! please read and answer correctly

1) Suppose your employer asks you, the human resource manager, to justify the relatively large recruiting budget that you have been historically assigned. What arguments would you provide? What indices or measures will you provide to show that your recruitment is cost-effective?

2) After months of insufficient recognition (and 2 years without a raise), you accept an offer from another firm for a $2,000-a-year raise. When you tell your boss you are resigning, you are told how crucial you are to the business and are offered a raise of $2,500 per year. What do you do? Why? What problems might exist if you accept the buy-back?

3) What is the strategic importance of the selection function for an organization?

4 List and briefly discuss the various steps in the selection process.

5) What are the different types of validity? If you want to validate a new dexterity test (which measures physical coordination) for workers in an assembly plant, how will you go about it?