SOLVED: Using the SIR model with a vector, draw out the set of differential equations that define a vector SIRS model using dS/dt, dI/dt, dR/dt, dX/dt, and dY/dt, and write out the equations. Label each variable and parameter. Draw arrows to indicate the conversion of susceptible hosts via infected vectors to infected hosts (i.e., show exactly what is in contact with what to achieve the transmission) and do the same to indicate the conversion of uninfected vectors via infected hosts.