A straight wire of linear mass density is 150g/m has acutely of 40.0 A ( supplied by a flexible connection of negligible mass.) this wire lies parallel to, and on top of another straight horizontal wire on a table. What current must the bottom wire have in order to repel and support the top wire at a separation of 4.0 cm? ( frictionless guide plates keep the top wire parallel to the bottom wire at is rises.)