a$.$What$$s the expected time for the completion of a product?$$b$.$What$$s the standard deviation of the completion time?$$c$.$If the production is valid in $2$ shifts of $6$ hours, how many days are required, on the$$average$,$ to produce a demand of $2500$ products?$$d$.$The manufacturer states that if it takes more than $40$ min to finish a product, his$$loss profit will be $0\mathrm{.}50$ TL for each min. Then what$$s his expected loss? For $2500$items$?$