30 November 2023 5:37:25.390 PM backward_euler_test(): FORTRAN77 version Test backward_euler(). predator_prey_be_test() A pair of ordinary differential equations for a population of predators and prey are solved using midpoint(). The exact solution shows periodic behavior with a fixed period and amplitude. predator_prey_be_test: data stored in "predator_prey_data.txt". predator_prey_be_test: plot commands stored in "predator_prey_commands.txt". stiff_be_test(): Solve stiff ODE using backward_euler() plot2: data stored in "stiff_data1.txt" and "stiff_data2.txt". plot2: plot commands stored in "stiff_commands.txt". backward_euler_test(): Normal end of execution. 30 November 2023 5:37:25.391 PM