An object is placed from a concave mirror with a radius of curvature of 50cm. The object has a height of 5cm.

a)Calculate the focal lenght of the mirror.
b)Calculate the position of the image formed by the mirror. Is the image real or virtual?
c)Calculate the size of the image. How is it orientated with respect to the object?
e)A diffraction grating has 600 lines/mm. Light with a wavelenght of 600nm is incident on it. A screen is placed 0.1m from the grating. Calculate the distance from the 1st and 2nd order maxima on the screen