RE:Warrants A) The market decides the price, however, regardless of market price, they will still have $0.40 cent of "Intrinsic Value" if you sell them.
B) That again depends what the market price is. Exercising the warrants would give you an immediate $0.40 cent profit (though you would have to pay $0.60 cents up front for the privilege of selling them).
Though it might be the case that the Market prices in a "time value". Meaning the warrants would have an Intrinsic Value of $0.40 cents + a Time Value of maybe $0.02 cents. In which case you might be better off selling the Warrants for a $0.42 cent profit, rather than paying the capital of $0.60 cents to purchase the shares and then sell them. But again, that totally depends on what the market offers at the time you are ready to sell.
C) Selling your warrants will not affect the VIBE price. Though Exercising your warrants will. Selling your warrants just means you are selling the "option" of buying shares to someone. But no actual shares are transferred, only the "ability to choose" is sold.
Exercising your warrants means you are actually buying the shares. And those share are going to come from the company directly. Meaning that the company will issue more shares, and there will be more shares on the market, which in turn will dilute the value of all the shares on the market. In theory, lowering the share price.
Though again, if it is a good company, that might not matter too much since it happens all the time, and good companies go up in price even with minor dilution.