Someone please help me with this matlab function please!

This activity uses a 3rd party app. Though your activity may be recorded, a refresh may be requined to update the banner to the left. Left Riemann numerical integration A curve is represented by column arrays xCoordinate and yCoordinate. Approximate the integral from xCoordinate(1) to xCoordinate(end) using the Left Riemann approximation method. Assign sumArea with the approximate area under the curve. Hint: A row array re the presenting area of each rectangle can be calculated by (difference between each element in xCoordinate) Coordinate(1:end-1) f(x) Ex: If xCoordinate [1, 3, 5] and yCoordinate 312, 4, 7], then sumArea (3-1)(2) (5-3)(4) 4 8 12