SOMEONE HELP ME PLEASE I NEED TO GET THIS DONE ASAP. I WILL GIVE YOU BRAINLIEST

Given the equation −4  = 12, solve for x and identify if it is an extraneous solution.

The random variable x has probability density function f (x) = k(−x²+5x−4) 1 ≤ x ≤ 4 or =0 1 show that k = 2/9 find 2 e(x), 3 the mode of x, 4 the cumulative distribution function f(x) for all x. 5 evaluate p(x ≤ 2.5). 6 deduce the value of the median and comment on the shape of the distribution.

Iwas absent when my class learned this and my teacher is to lazy to teach it to me explain this to me .