The amount of lateral expansion (mils) was determined for a sample of n = 5 pulsed-power gas metal arc welds used in lng ship containment tanks. the resulting sample standard deviation was s = 2.84 mils. assuming normality, derive a 95% ci for σ2 and for σ. (round your answers to two decimal places.)

Find a parametrization for the curve「and determine the work done on a particle moving along γ in r3 through the force field f: r^3--r^3'where f(x,y,z) = (1,-x,z) and (a) im (γ) is the line segment from (0,0,0) to (1,2,1) (b) im (γ) is the polygonal curve with successive vertices (1,0,0), (0,1,1), and (2,2,2) (c) im (γ) is the unit circle in the plane z = 1 with center (0,0,1) beginning and ending at (1,0,1), and starting towards (0,1,1)