Can someone help answer these and show how?

Find the variance in the momentum coordinate o? = ((p - (p))2). In order to do this, you will need to evaluate the integral: g(x) (p -(p))2 g(x) dx = g(x) [pp - 2p(p) + (p)?] g(x) dx -0O - 00 State the value of the standard deviation of the momentum coordinate op. Use your answers to problems 6 and 8 to calculate the "position-momentum uncertainty product": Ox . Op = V(x - Xo)2 . V(p - Po)2 = Ax . Ap. What is the significance of this number