An elderly lady, nursing home resident, with background of advanced dementia, previous stroke, ischaemic heart disease, hypertension, type 2 diabetes mellitus, and recuurent urinary tract infection, was admitted to hospital due to reduced oral intake for 1 week, with few episodes of pyrexia for the last 2 days, became increasing confuse and agitation. Patient was confused on admission, with low grade pyrexia, with hypotension of blood pressure around 80/60. Blood tests showed elevated white cell count, neutrophil, and CRP. ECG and chest x ray were normal. Urine dipstick showed likely urinary tract infection. Urine and blood culture & sensitivity was sent. What is your diagnosis (patient was hypotensive) for this patient ?? What will be your management and treatment plan ??