exam Maths Puzzle Numerical Ability

Please me with these problems.

1.Find a polynominal with leading coefficient 1 and degree 3 that has-1,1 and 3 as roots.
possible answers

a.x^3-3x^2-x+3
b.x^3-3x^2+x-3
c.

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exam Other Question

Solve the inequality and graph the solution

x - 5 < 3 The problem reads to solve: The time t required to drive a fixed distance varies inversely as the speed r. It takes 5 hr at 55mph to drive a fixed distance. How long would it take at 40mph?

Any help with this problem would be greatly appreciated.