For each of the following sets of reactions, describe your reactor system and conditions to maximize the selectivity to D$.$ Make sketches of reactor configurations where necessary to support your choices. The rates are in mol L$-1$ s$-1,$ and the concentrations are in mol$/$L$.$a$)$

$(1)$

$A+BD,-r_{1A}=10$exp$(-8,000\frac{K}{T})C_A{C}_B$

$A+BU,-r_{2A}=100$exp$(-1,000\frac{K}{T})C_A^{\frac{1}{2}}{C}_B^{\frac{3}{2}}$

b$)$

$A+BD$

$-r_{1A}=100$exp$(-1,000\frac{K}{T})C_A{C}_B$

$A+BU$

$-r_{2A}={10}^6$exp$(-8,000\frac{K}{T})C_A{C}_B$

c$)$

$A+BD$

$-r_{1A}=10$exp$(-1,000\frac{K}{T})C_A{C}_B$

$B+DU$

$-r_{2A}={10}^9$exp$(-10,000\frac{K}{T})C_B{C}_D$