Part 2: total 4 marks Serena is managing an investment portfolio. She invested in four stocks in her portfolio on 15th of December 2020. Table below presents the price changes of these four stocks from 15th of December 2020 to 20th of January 2021. Stocks 15th of December 2020 20th of January 2021 ABC $16.28 $18.30 XYZ $19.20 $16.75 TSV $35.10 $31.31 DRT $100.64 $101.00 On 20th of January 2021, Serena sold stocks ABC and DRT and continued holding stocks XYZ and TSV. What is the best terminology to describe Serena's behaviour? Please use terminology covered in the lectures and explain your answer. (4 marks)