The cockroach Periplaneta americana can detect a static electric field of magnitude E = 7.5 KN (note units are kilonewtons per Coulomb) using their long antennae. If the excess static charge on a cockroach is modeled as point charges located at the end of each antenna, what magnitude of charge q would each antenna possess in order for each antennae to experience a force of magnitude F = 2.80 /N (note in micronewtons) from the external electric field? Calculate q in units of nanocoulombs (nc)