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b.f(2)=4.2-2=6
f(-2)=4(-2)-2=-10
f(4)=.4.4-2=14
f(-4)=4(-4)-2=-18
c.f(p)=4p-2
8=4p-2
4p=8+2
4p=10
p=10/4
p=5/2=2 1/2