a two-slit diffraction experiment is done with slits of unequal widths. when only one slit is open, the number of electrons reaching the screen per second is 25 times the number of electrons reaching the screen per second when only slit 2 is open. when both slits are open, an interference pattern shows up. find the ratio of the probability of an electron arriving at an interference maximum to the probability of an electron arriving at an adjacent interference minimum.