Help me with these functions a) hf(x) and hence hf(x)=12
b) gf(x) and hence gf(2)
c) if(x) and hence if(10)
d) fh(x) and hence fh(-6)
e) hi(x) and hence hi(6)
f) gg(x) and hence gg(3)
g) hfg (x) and hence hfg(-7)
h) hfi(x) and hence hfi(-4)
i) ffg(x) and hence ffg(-1)
j) fhf(x) and hence fhf(1/2)

I do not understand these questions i am meant to answer i would really appreaciate help