Client with serum magnesium level of 1.1 mEq/L who has tremors and hyperactive deep tendon reflexes.

Client with serum sodium level of 145 mEq/L who has a dry mouth and is asking for a glass of water.

Client with serum potassium level of 5.0 mEq/L who is complaining of abdominal cramping.

Client with serum phosphorus level of 4.5 mg/dL.