IKMC 2027 - Grades 11-12 - Self-study SET 8 - Thematic Batch 3 Question 3

The Fibonacci sequence satisfies $F_{1}$=$F_{2}$=1 and $F_{n+2}$=$F_{n+1}$+$F_{n}$ for every positive integer n. How many of its first 2020 terms are even?