A space traveler whose mass is 108 kg leaves earth. What are his

**(a)** weight and

**(b)** mass on earth and

**(c)** weight and

**(d)** mass in interplanetary space where there are no nearby planetary objects?

I know mass is the same so b) and d) are 108 kg

i know gravity constant on earth so W = 1.06 E 3

But i didn't know how to go about the weight when there isn't a distance from earth or other masses or anything!

If Fg = GMm / r^2

and the only known is G and m, that can't work.

If i assume no gravity for F = mg, is it zero?

please help

Thanks in advance