PLS ANSWER. IM BEING TIMED. Which polynomial function could be represented by the graph below?

f(x)= x^3 - 5x^2 + 4
f(x)= x^3 + 5x^2 + 4
f(x)= -2x^3 + 10x^2 - 8x
f(x)= -2x^3 + 10x^2 + 8x

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)