42. Consider the two-compartment model shown in Figure 7.15 with K12=0.3,K10=0.2, K21=0,K20=0.4,f1(t)=4u(t), and f2(t)=5(t). Assume that the initial conditions are zero. Solve for the quantity in each compartment. 42. Consider the two-compartment model shown in Figure 7.15 with K12=0.3,K10=0.2, K21=0,K20=0.4,f1(t)=4u(t), and f2(t)=5(t). Assume that the initial conditions are zero. Solve for the quantity in each compartment