Frosts Java hw

public boolean isLevelTrailSegment(int start, int end) {
int min = this.markers[start];
 int max = this.markers[start];
for (int i = start + 1; i <= end; i++) {
 if (min > this.markers[i]) {
 min = this.markers[i];
 }
 if (max < this.markers[i]) {
 max = this.markers[i];
}
}
return ((max - min) <= 10);
}

B)
public boolean isDifficult() {
 int numChanges = 0;
 for (int i = 0; i < this.markers.length - 1; i++) {
 if (Math.abs(this.markers[i] - this.markers[i + 1]) >= 30) {
numChanges++;
}
 }
return (numChanges >= 3);
 }