The file "rhDNase.txt" (available on the LEARN course website) contains the data from these patients with following variables: a subject identifier number (id), a treatment indica- tor (trt=1 for rhDNase, 0 for placebo control), a measure of baseline lung function (fev), number of exacerbations experienced during the study (count), and the duration of observa- tion (time). (a) [1] Consider a Poisson GLM (with the canonical link) to evaluate the treatment eect (trt) on the number of exacerbations (count) while controlling for the baseline lung function (fev). Write down the expression of the Poisson regression model, be sure to include an appropriate oset and clearly define the notation you used