Question 19 Choose the correct expression. Total-price=itemQty * Item Price Totalprices=itemQty * Item Price Total_price=itemQty * Item Price Total_price=ItemQty * ItemPrice Question 21 The four main components of an algorithm are - O data acquisition, input, output, store sequence, loop, condition, calculation input, output, store, calculation O data acquisition, sequence, selection, iteration Question 22 The next step after writing the algorithm is usually: o write a computer code or program apply the processes of computational thinking O apply the principles of abstraction O generate a QR code