The prescribed treatment for a client with type 1 diabetes involves the self-administration of a combination of two insulins, short-acting insulin (Humulin R) and intermediate-acting insulin (Humulin...

The prescribed treatment for a client with type 1 diabetes involves the self-administration of a combination of two insulins, short-acting insulin (Humulin R) and intermediate-acting insulin (Humulin N). Which action indicates that the client needs more practice?

1. The client instills air into the short-acting and intermediate-acting insulin vials.

2. The client withdraws the intermediate-acting insulin first and then the short-acting insulin.

3. The client rolls the vial of intermediate-acting insulin to mix it with its additive.

4. The client inverts each vial prior to withdrawing the specified amount of insulin.