Write an instream SAS DATA step that reads the following records, assigning each of the four fields to the variables Size, Colour, Price, and Shipping Cost respectively. The period "' in a field stands for missing value. Replace the missing values by value 0. Large Red 18.97 0.25 Medium Blue. 1.10 X-Large 29.99 1.75 Small Orange 15.89 0.90