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What are the media IDs for Figure 4 (Conjunction-class Mars missions) and Figure 5 (Opposition-class Mars missions) on page 25 of the source?

 title: 'Figure 16—Compared with cramped Apollo spacecraft, the lodgings proposed for NASA's 1980s Mars ships were palatial. In this cutaway, note the four-deck Mission Module (center) and large conical Mars lander (right). (NASA Photo S-69-56295)'

Figure 4, “Conjunction-class Mars missions,” corresponds to the embedded media file figures/4.png, and Figure 5, “Opposition-class Mars missions,” corresponds to figures/5.png.[1]

Space: Humans to Mars: Fifty Years of Mission Planning, 1950-2000