Answer Key 4.6

$\textbf{Action taken:}\hspace{0.9in}\textbf{Each container holds:}$

$\begin{array}{ccccccccrccccc} \text{Step 1.}&\underline{\text{Fill B using A}}\hspace{0.25in}&A&=&11&B&=&13&C&=&0&D&=&0 \\ \\ \text{Step 2.}&\underline{\text{Fill D using B}}\hspace{0.25in}&A&=&11&B&=&8&C&=&0&D&=&5 \\ \\ \text{Step 3.}&\underline{\text{Fill C using B}}\hspace{0.25in}&A&=&11&B&=&0&C&=&8&D&=&5 \\ \\ \text{Step 4.}&\underline{\text{Pour D into A}}\hspace{0.25in}&A&=&16&B&=&0&C&=&8&D&=&0 \\ \\ \text{Step 5.}&\underline{\text{Fill B using A}}\hspace{0.25in}&A&=&3&B&=&13&C&=&8&D&=&0 \\ \\ \text{Step 6.}&\underline{\text{Fill D using B}}\hspace{0.25in}&A&=&3&B&=&8&C&=&8&D&=&5 \\ \\ \text{Step 7.}&\underline{\text{Pour D into A}}\hspace{0.25in}&A&=&8&B&=&8&C&=&8&D&=&0 \end{array}$