I need the answers to the following questions

1) Consider a circuit contains an inductor of inductance L with an ac supply voltage. Does the current lead or lags behind the voltage? Draw their wave shapes and phasor diagram. Also define the inductive reactance from there.

2)What modifications does Maxwell make on four fundamental equations for electromagnetism? Write down their mathematical equations in differential form with their physical meanings. How can you calculate the speed of an electromagnetic wave?

question 1 is from chapter-AC circuits whereas question 2 is from chapter -EM Waves