To hit an average of 120k across four quarters, the total for the year must be 4 × 120k = 480k. If Q4 is 150k, the first three quarters would need to sum to 480k − 150k = 330k, which means those three quarters would average 110k each—consistent with reaching the overall target. Any other Q4 value changes the total away from 480k (for example, 140k gives 470k total and 117.5k average, 130k gives 460k total and 115k average, 160k gives 490k total and 122.5k average). Therefore, Q4 should be 150k to achieve the 120k average.

The concept being tested is planning horizon for fire support. Fires that are planned in advance are arranged as part of the operation plan, with targets, timing, and coordination with air assets already set. This fits the description of air route fires aimed at known or suspected enemy positions because the FSO is organizing and sequencing these engagements ahead of time to ensure proper airspace management, weapon choice, and synchronized effects. In contrast, on-call fires are requested during the operation in response to targets appearing, immediate fires are urgent responses to threats right now, and contingent fires depend on specific conditions or triggers. So, planning them in advance to address known or anticipated positions makes the preplanned option the best fit.

Understanding simple interest means multiplying the principal by the annual rate (as a decimal) and by the time in years. Here, 1,000 × 0.06 × 3 = 60 × 3 = 180, so the interest earned over three years is $180. Since this uses simple interest, there’s no interest-on-interest effect. Therefore, the correct amount is $180.

The main idea here is who owns the integration of air support with ground operations at the brigade level. The Brigade Aviation Officer serves as the aviation adviser to the brigade commander, responsible for planning and synchronizing all aviation tasks—lift, reconnaissance, fires, MEDEVAC, and more—with the ground scheme of maneuver. This role ensures air assets are allocated, tasks are timed to support ground operations, and airspace and safety are deconflicted, all in alignment with the brigade’s intent and priorities. Other roles have narrower or different scopes: the Air Mission Commander leads a specific air mission and is focused on executing that mission; the Aviation Liaison Officer acts as a liaison to facilitate communication between air and ground units but does not own the entire aviation plan for the brigade; the Flight Lead commands a single flight. The Brigade Aviation Officer is the one who coordinates the overall plan across all aviation assets to support ground forces.