SAS Question

Assume you have a data file called VIRUS_PROLIF from an infectious disease research center. Each observation has 3 variables SAMPLE_NUMBER CELL_TYPE, and COUNT, where COUNT is a value for the initial count of the number of virions in a cell. If we assume that the virions replicate at a rate such that the total number of virions will increase by 10% per minute, write the SAS code using DO UNTIL to calculate how long one would predict it would take (in minutes) for the number of virions to exceed 100,000 for each cell.

Then, write the SAS code using a data step and accumulating variables to calculate the minimum, maximum, and average time to exceed 100,000 virions for the cells of each CELL_TYPE.