1. A boat is headed across a river with a velocity relative to water) that can be represented as (6.5 + 1.7) mi/h. The velocity of the river current can be represented as (- 1.1 - 4.3j) mi/h. Express the resultant velocity of the boat in polar form.
2. Use D'Moivre's theorem to find the two square roots of - 5+12j.
3. If E = 5.70 - 3.65j mV and I = 0.36 - 0.525j μA, find the complex number representing Z.