Given the definitions of f(x)f(x) and g(x)g(x) below, find the value of (f\circ g)(-2).(f∘g)(−2). f(x)=
f(x)=
\,\,3x^2+6x+11
3x
2
+6x+11
g(x)=
g(x)=
\,\,2x+7
2x+7

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?