CAN SOMEONE HELP ME PLEASE ITS A QUIZ

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

In a school 2/3 of the students study a language of those who study a language 2/5 study french

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.