Use double integration Method to set elastic curve, slope eq a dellection at B

$E=10,000ks.$

$I=4001.$ Use double$-$integration method to determine $1)$ the elastic curve of the beam; $2)$ the deflection and slope at A$.$ El is a constant. $2.$ Use double$-$integration method to determine $1)$ the elastic curve of the beam; $2)$ the slope at B ; $3)$ the deflection and slope at C$.$ El is a constant.