exam Maths Puzzle Numerical Ability

Find the what what and the what? please help me!!! Find (a)the directrix,
(b) the focus and (c) the roots of the parabola y = x^2 - 5x + 4
(a)_________________
(b)_________________
(c)_________________

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exam Other Question
Reduce the following to a single logarithm

2log2-3log4+log6 A company makes three types of backpacks for a cost of $754 for 100 backpacks. Production costs for the three types are $5, $8, and $12. They sell for $20, $30, and $50 respectively. How many of each type are made if the profit is $2226?