Yes, jealousy is just another emotion and it is very natural for us to feel it. No one is immune to it. But then emotional management is so important and one has to bring it to practice with conscious efforts. Any human emotion ( even the good ones) can go out of control if we are not able to manage it. One could get inspiration and motivation from the same person, from whom you feel jealous. It's just the matter of channelizing it in the right direction.
Channelizing life in the right direction will wipe out jealousy from the heart.
I am not sure if it can be totally wiped out. If negative emotions are totally wiped out, we would reach salvation and a stage of nirvana. That is not possible for every common soul to achieve. But yes, we all are capable of acknowledging our emotions, getting it in control and channelizing it in a positive way.
Yes that's the way to go. if we can work hard to achieve things fir ourselves there will be mi need for envy or jealousy
Hard and sincere effort doesn't give place to jealousy.
