8.請繪圖及簡要說明(A)第二信使(secondmessenger)(B)支架蛋白 (scaffold protein)在訊息傳遞(signal transduction)中的作用·(10%)

(i) (10%) Suppose that the daily concentration follows a normal distribution. The critical level of pollutant concentration would be reached if the daily concentration exceeds 100 mgl. What is the probability that the daily concentration of pollutants in the river would not exceed the critical level?