45 A multiple-comparison procedure for comparing four treatment means produced the confidence intervals shown here. Rank the means from smallest to largest. Which means are significantly different?

(m1 - m2): (2, 15)

(m1 - m3): (4, 7)

(m1 - m4): (-10, 3)

(m2 - m3): (-5, 11)

(m2 - m4): (-12, -6)

(m3 - m4): (-8, -5)