Mrs Johnston is a 65-year-old female, who has been admitted to hospital with right upper lobe pneumonia. She has a past medical history of chronic obstructive pulmonary disease, angina, hypertension, anxiety, depression, congestive cardiac failure and is a type 2 diabetic on a Novorapid sliding scale. You are on the morning shift and are due to start your medication round at 0800 hrs. Her morning BGL was done at 0730 hrs and her BGL was 12.5mmol/l.Mrs Johnston is on Metoprolol for her angina. What class of drug is this?Discuss the pharmacodynamics of this class of drug. (Refer to your answer in Question 1 for the drug class)Discuss what precautions should be taken prior to administrating this medication (Metoprolol).