I still am not grasping the four partial derivatives, please help. If you need the decimals up top to be more clear let me know please!

The annual profit P (in dollars) of nursing homes in a region is given by the function P(w, r, s, t) =0.007377w 0.689 1 064 0 884 2.455 where w is the average hourly wage of nurses and aides (in dollars), r is the occupancy rate (as a percentage), s is the total square footage of the facility, and t is a number between 1 and 11 that measures the reimbursement rate in the region. A certain nursing home has nurses and aides with an average hourly wage of $15 an hour, a reimbursement rate index of 9, an occupancy rate of 80%. and 390.000 ft2 of space b) Find the four partial derivatives of P ap aw (Simplify your answer. Use integers or decimals for any numbers in the expression, Round to six decimal places as needed.) OP ar (Simplify your answer. Use integers or decimals for any numbers in the expression, Round to six decimal places as needed.) OP ds (Simplify your answer. Use integers or decimals for any numbers in the expression Round to six decimal places as needed ) OP