An experiment was conducted to know the estimated dosage level that kills 50% of the subjects. Note that the first variable, Dose, gives the dose level of the treatment. The second variable, Subjects, gives the number of individuals receiving a specific dose level. The third variable, Response, gives the number of treated individuals who exhibited the response of interest (no. of dead). Fit the probit regression model and find the LC50.

Dose Subjects Response Mortality rate (%) Probit log10(X) .. XY *2 50 103 19 60 119 26 70 111 25 80 105 31 90 118 55 100 109 83 Total: "Round-off mortality rate (%) in nearest whole number. "Round-off log ,(X) in two decimal places