Checkpoint 2 Answers

1. `P_3 text[(] x text[)] = 1 + x + x^2/2 + x^3/6` and `P_4 text[(] x text[)] = 1 + x + x^2/2 + x^3/6 + x^4/24`

2. 
   
   
   Exponential function and polynomial approximations up to degree `4`