If the particle is in the ground state, what is the probability that it is in a window δx=0.0002l wide with its midpoint at x=0.700l? you should be able to answer this part without evaluating any integrals! since δx is so small, you can assume that ψ(x) remains constant over that interval, so the integral is approximately

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.