Suppose you want to interpolate the data below with a cubic spline. Given the cubic function s1 = x3 - 4x + 3 for the interval 0 < x < 2 and the cubic function given by s2 = A(x-2)3 + B(x-2)2 + C(x-2) + D for the interval 2 < x < 4. Calculate the value of the coefficient A that ensures (along with appropriate values of B, C, and D) these two functions form a spline. Enter your answer to four decimal places.

x	0	2	4
y	-1.0	3.0	5.5