Consider the following statements regarding a single peak hydrograph:

(i)  The slope of the rising limb depends upon the initial losses.

(ii) The recession limb is independent of storm characteristics.

(iii) The starting point of recession limb is represented by the peak discharge.

(iv) Basin with form factor less than 1, results into the hydrograph with small time base with large peak.

Which of the above statements are true?