Hi, can you help me solve these two standard deviation and density questions? Thank you!

2. [-/12.5 Points] DETAILS WANEFMAC6 P.3.007. MY NOTES Find the expected value E(X), the variance Var(X) and the standard deviation o(X) for the density function. (Round your answers to four decimal places.) f(x) = ex on [0, In 2] E(X) = Var(X) = o(X) =1. [-/12.5 Points] DETAILS WANEFMAC6 P.3.004. MY NOTES Find the expected value E(X), the variance Var(X) and the standard deviation o(X) for the density function. (Round your answers to four decimal places.) ((x) = 7x on 0, v 2/7 E(X) = Var(X) = o(X) =