can you show me using eulers method?

Case 4 Investigate the effects of introducing a grouse population. Grouse play the same ecological role as rabbits. Assume no food limitations for rabbits or grouse. Governing Equations dr/dt = GRR*r -(EFR*f)*r dg/dt = GRG*8 -(EFG*f)*g df/dt = GRF*f +(ERF*r)*f +(EGF*g)*f r, rabbits 8. grouse f, foxes . O o o O Inputs parameters= (GRR,EFR, GRG,EFG, GRF,ERF,EGF] o GRR, growth rate of rabbits EFR, effect of foxes on rabbit increase GRG, growth rate of grouse EFG, effect of foxes on grouse increase o GRF, growth rate of foxes ERF, effect of rabbits on fox increase O EGF, effect of grouse on fox increase initconds= [rinit,ginit, finit) o rinit, initial rabbit population o finit, initial fox population timedata= [tinit,tfinal delt] o tinit, time at the start of the model run otfinal, time at the end of the model run o delt, the size of the time step in Euler's method Outputs rvec, rabbit history gvec, grouse history fvec, fox history . Function Setup function (rvec,gvec,fvec )= PredatorPrey_4_fcntparameters,timedata, initconds) % Your code here end