1. Correct Answer: a: *Wednesday*
 2. Explanation:
     To determine which day it will be on the 10¹⁰ day from a Sunday, we need to calculate the remainder when 10¹⁰ is divided by 7, since there are 7 days in a week.
     Step-by-step Calculation:
     ● Step 1: Calculate 10¹⁰ modulo 7.  
     ● Step 2: Use properties of modular arithmetic to simplify the calculation:  
           ○ 10 ≡ 3 (mod 7) because 10 divided by 7 leaves a remainder of 3.
           ○ Therefore, 10¹⁰ ≡ 3¹⁰ (mod 7).
     ● Step 3: Calculate 3¹⁰ modulo 7:  
           ○ 3¹ ≡ 3 (mod 7)
           ○ 3² ≡ 9 ≡ 2 (mod 7)
           ○ 3³ ≡ 6 ≡ -1 (mod 7)
           ○ 3⁴ ≡ -3 ≡ 4 (mod 7)
           ○ 3⁵ ≡ 12 ≡ 5 (mod 7)
           ○ 3⁶ ≡ 15 ≡ 1 (mod 7)
     ● Step 4: Notice that 3⁶ ≡ 1 (mod 7), which means every 6 powers, the cycle repeats.  
     ● Step 5: Since 10 = 6 + 4, we can express 3¹⁰ as:  
           ○ 3¹⁰ = (3⁶) * (3⁴) ≡ 1 * 4 ≡ 4 (mod 7)
     ● Step 6: Since 10¹⁰ ≡ 4 (mod 7), the 10¹⁰ day from Sunday is 4 days after Sunday.  
     ● Step 7: Counting 4 days from Sunday:  
           ○ Sunday → Monday → Tuesday → Wednesday → Thursday
     Therefore, the day on the 10¹⁰ day is Wednesday.