The variables surname and student_id are initialized as follows:
surname ← 'MacDonald'
student_id ← '2024_A7'
A developer writes the following statement to generate a login code:
code ← SUBSTRING(3, 4, surname) + SUBSTRING(5, 2, student_id)
The function SUBSTRING(start, length, string) extracts a substring from string starting at the 0-based index start with the specified length. The + operator performs string concatenation.
What is the resulting value of the variable code?
’DonaA7’\text{'DonaA7'}’DonaA7’
’cDon_A’\text{'cDon\_A'}’cDon_A’
’Dona_A’\text{'Dona\_A'}’Dona_A’
’cDonA7’\text{'cDonA7'}’cDonA7’