Please solve the following time series exams

E) toward fifty 9) Gaussian surfaces A and B enclose the same positive charge +Q. The area of Gaussian surface A is three times larger than that of Gaussian surface B. The flux of electric field through Gaussian surface A is A) nine times larger than the flux of electric field through Gaussian surface B. B) unrelated to the flux of electric field through Gaussian surface B. C) equal to the flux of electric field through Gaussian surface B. D) three times smaller than the flux of electric field through Gaussian surface B. 10) If the electric field is in the positive x direction and has a magnitude given by E = Cx', where C is a constant, then the electric potential is given by V= A) 2Cx B) -2Cx C ) CP3 /3 D) -Cx/3 E) -30Problems 29 1.4 Consider the time series X't = Bo + Bit + wt. where Bo and By are regression coefficients, and wt is a white noise process with variance oz (a) Determine whether It is stationary. (b) Show that the process 1 = X - X-1 is stationary. (c) Show that the mean of the moving average U. = (Xt-1 + * +X/+1) is Bo + Bit