exam Maths Puzzle Numerical Ability

Please help,

Solve the following system of linear inequalities by graphing

x+y<5
0&#8804;y&#8804;3
x&#8805;1

Thanks
JMS

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exam Other Question

(1,1)
A=(0,2) find a matrix B such that C(A)=N(B)
(1,0)

i get that c(a) means column space and n(b) is a null space, but no idea how to d
Please help me:

Find the zeros of the following functions:

f(x)=x^4+6x^3+11X^2+12x+18