Hospital H conducted a survey of two groups of patients who were enrol

Hospital H conducted a survey of two groups of patients who were enrolled in an exercise rehabilitation program last month. Was the range of the numbers of days that the patients in the first group exercised last month equal to the range of the numbers of days that the patients in the second group exercised last month?

(1) For each group, the number of patients enrolled was 21 and the least number of days that a patient exercised last month was 5.

(2) For each group, the average (arithmetic mean) number of days that the patients exercised last month was 13.

statement 1:
The number of patients in each group = 21
minimum number of days that a patient exercised in each group = 5
but we do not know the maximum number of days that a patient in each group exercised.
not sufficient

statement 2:
lets consider the number of patients in each group be x.
for each group, total number of days that all patients exercised = 13*x
but this does not gives us minimum or maximum number of days that a patient exercised.
not sufficient

combining both statements,
total number of days that all patients exercised in each group = 13*21 = 273
but still do not know maximum number of days that a patient in each group exercised?

Ans: E