A 407- turn solenoid with a length of 29cm and radius of 1.4 cmcarries a current of 2.3 A. A second coil of 4 turns is wrappedtightly about this solenoid so that it can be considered to have the same radius as the solenoid. Find the change in the magnetic flux through the coil when the current in the solenoid increases to6.1 A in a period of .72s. The permeability of a vacuum is 4πx 10-7.