Which charge must the particles have to create the electric filed shown?

Suppose that recording station n is located 200 km north of the epicenter of an earthquake, and recording station s is located 100 km south of the epicenter of the same earthquake. which of the following statements would be true?

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?