Checkpoint B For Checkpoint B you will extend Checkpoint A to do the following: 1. Prompts the user for an additional parameter: the bound on the timescale $n$ of the simulation If a user inputs a negative timescale, the program should immediately print an error message and exit. 2. The program will calculate , for every time in and output these populations at each step • If the population grows negative, treat it as population that has become zero. Hint: your program will need a for-loop. Complete this checkpoint after we have introduced for-loops in class. Sample Output Sample input/output behavior for the checkpoint are provided below. Your program's spacing, spelling, capitalization, and punctuation will need to match the sample output EXACTLY for this project. Ex 1 Sample Input/Output Given inputs a, 6, 7, 8, ko, ug, nas: 1.5 .001 .05 2.5 100 2 10 The program outputs ==> Bull Kelp and Purple Urchin Population Simulator <== Model Parameters --- Kelp growth rate: Kelp death rate: Urchin birth rate: Urchin death rate: --- Initial Population Kelp population (in thousands) at t = 0: Urchin population (in thousands) at t = 0: --- Simulation --- Timescale: 1508.970k kelp, 2280.018k urchins Time t = 0: 100.000k kelp, 2.000k urchins Time t = 1: 249.800k kelp, 7.000k urchins Time t = 2: 622.751k kelp, 76.930k urchins Time t = 3: Time t = 4: Time t = 5: Time t = 6: Time t = 7: Time t = 8: 331.946k kelp, 168603.957k urchins 0.000k kelp, 2545463.659k urchins 0.000k kelp, 0.000k urchins 0.000k kelp, 0.000k urchins 0.000k kelp, 0.000k urchins Time t = 9: 0.000k kelp, 0.000k urchins Time t = 10: 0.000k kelp, 0.000k urchins