Consider a copper wire that carries an electric current. Without insulation, the wire has a radius of 7', and with insulationI the radius is R. '1' 2 \"r For a positive constant k, a surge of electricity has a velocity that is given by 'v = k() 111(E). Part (a): - (i) What will the velocityIr approach as the thickness of the insulation approaches zero? Enter a number. an expression involving the variables 'r and/or R . inf [for 00), or -inf {for oo}. Answer: 1') } . (ii) If we interpret the result from part {i} in the real-world context, is it physically possible for this to occur? Enter Y for "Yes" and N for "No". Part {b}: - [i] Suppose that the wire has insulation of some xed, nonzero thickness. What does the velocity approach if the wire's diameter [excluding the insulation} approaches zero? Enter a number. an expression involving the variables '3" andior R , inf [for 00}, or -inf {for oo). Answer: 1') > . [ii] If we interpret the result from part {i} in the real-world context, is it physically possible for this to occur? Enter Y for "Yes" and N for "No"