probability distribution for the discrete random variable- 2 unknowns

Question

Fill in the values in the table below to give a legitimate probability distribution for the discrete random variable "X". , whose possible values are -5, -3 ,-2, 3 and 5.

Value of x of X: P(X=x)

 -5        :   0.11
 -3        :   0.12
 -2        :   0.30
  3        :    ?
  5        :    ?

I tried

0.11+0.12+0.30+X1+X2=1

But i can't find the answer