Which line statement is drawn in the figure?

Can any one me with the answers to these questions asap?

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy.how much will she pay after the discount