Call options valuation

Hi all,

I'm in need for som help when it comes to the valuation of call options using B-S. I am very grateful for all help I can get.

"Company X" is issuing 4m call options. They are to be issued in 12m from today and can be used after 24m from today.

Strike price is USD 5.

Share price as of today is USD 3.55

Currently there are 24m shares, however, there will be 49m shares before the call options will be issued. (I assume the larger number should be used?)

Let's assume the risk free rate is 0.5%.

Standard deviation, not calculated but I assume that should based on the share price for the last "Y" months?

What would be the Call option premium? I.e. the price?

Thanks a lot for any help regarding this valuation.

/DSDSDSDS