please solve question 41 and 42 ;0

41. Consider the two-compartment model shown in Figure 7.15 with K12=0,K10=0.6, K21=0.1,K20=0.8,f1(t)=0, and f2(t)=(t)+5u(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. 43. Consider the two-compartment model shown in Figure 7.15 with K12=0.3,K10=0.5, K21=0,K20=1,f1(t)=2u(t), and f2(t)=3(t). Assume that the initial conditions are zero. Solve for the quantity in each compartment. 44. Consider the two-compartment model shown in Figure 7.15 with K12=0,K10=0.6, K21=0.1,K20=0.5,f1(t)=0, and f2(t)=(t)+5u(t). Assume that the initial conditions are zero. Solve for the quantity in each compartment