Do the following algorithms contain recursion and/or iteration? int algorithm1(int x) { int accumulator = 0; for(int i=0; i

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Do the following algorithms contain recursion and/or iteration?

int algorithm1(int x) {
int accumulator = 0;
for(int i=0; i<x; i++)
accumulator += 2*i+1;
return accumulator;
}
 
int algorithm2(int x) {
return x-3;
}
 
int algorithm3(int x) {
if(x<=1) return 2;
int accumulator = 0;
for(int i=0; i<x; i++) a
xxumulator += algorithm3(i);
return accumulator;
}
 
a. 1 is iterative
 
b. 1 is recursive
 
c. 2 is iterative
 
d. 2 is recursive
 
e. 3 is iterative
 
f. 3 is recursive
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