Need help to answer these questions about the constitution

Read the below passage carefully and answer the questions:

The government of an island nation is in the process of deciding
how to spend its limited income. It has $7 million left in its budget
and eight programs to choose among. There is no provision in the
constitution to have a surplus, and each program has requested the
minimum amount they need; in other words, no program may be partially
funded. The programs and their funding requests are:

* Hurricane preparedness: $2.5 million
* Harbor improvements: $1 million
* School music program: $0.5 million
* Senate office building remodeling: $1.5 million
* Agricultural subsidy program: $2 million
* National radio: $0.5 million
* Small business loan program: $3 million
* International airport: $4 million

Q1:

Senators from
urban areas are very concerned about assuring that there will be funding
for a new international airport. Senators from rural areas refuse to
fund anything until money for agricultural subsidies is appropriated. If
the legislature funds these two programs, on which of the following
could they spend the rest of the money?

Q2:

If the legislature decides to fund the agricultural subsidy program,
national radio, and the small business loan program, what two other
programs could they fund?

Q3:

If the legislature decides to fund the agricultural subsidy program,
national radio, and the small business loan program, the only other
single program that can be funded is