ABC Corporation holds a portfolio of investments in equity securities. The company follows the fair value measurement principles outlined in IFRS 13 or ASC 820 for financial reporting purposes. The following information pertains to the investments as of December 31, 2023:

1. Company A:

   • Number of Shares: 10,000
   • Market Price per Share: $50
   • Level of Observable Input: Level 1

2. Company B:

   • Number of Shares: 5,000
   • Market Price per Share: $30
   • Level of Observable Input: Level 2

3. Company C:

   • Number of Shares: 8,000
   • Market Price per Share: $25
   • Level of Observable Input: Level 3

Based on the provided information, perform the following tasks:

a. Calculate the fair value of the investments in Company A, Company B, and Company C. b. Discuss the classification of each investment based on the level of observable inputs (Level 1, Level 2, or Level 3). c. Explain the valuation techniques used for each investment and justify their classification within the fair value hierarchy. d. Discuss the implications of the fair value measurements on ABC Corporation's financial statements and disclosures.