data test2; set test; array price20 [12] price20_1-price20_12; array price21 [12] price21_1-price21_12; array pricediff [12] pricediff1-pricediff12; do m=1 to 12; pricediff(m)=price21(m)-price20 (m); end; run; Dataset Test has 50 observations and 25variables: State price20_1 - price20_12 price21_1 - price21_12 The price variables correspond to the average price of milk for each month of each year in 2020 and 2021 (e.g., price20_1 = the average price of milk in January for the year 2020). Each observation (row) in the dataset corresponds to one of the 50 US states. In a maximum of three sentences, describe the purpose of the array statement shown above and the information that is stored in the created variables