Write formulas based on these ideas here. For any constants you need for the rate$-$of$-$change for blood glucose, use symbols like b$0,$ b$1,$ b$2,$ etc,and for any constants you need for the rate$-$of$-$change for insulin, use symbols like c$0,$ c$1,$ c$2,$ etc.Excel weirdness: if you start a cell with a $"+"$ or a $"-",$ it will think you are typing an official formula. To avoid this, start with a single$-$quote $\text{'}$ and then whatever you want.