3.0 months
4.0 months
n/a
2.0 rounds
2.0 reports
effortless
1.5 months
2.6 months
n/a
2.0 rounds
2.0 reports
moderate
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
3.7 months
5.0 months
n/a
2.0 rounds
2.5 reports
difficult
24.0 months
25.2 months
n/a
5.0 rounds
10.0 reports
very difficult
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
1.7 months
1.8 months
n/a
2.0 rounds
4.0 reports
very easy