a$.$ Specify the type and name of the spatial filters given on the right, explaining their reasons. For what purpose can these filters be used?

b$.$ After an image is filtered with filter$1,$ the resulting image is filtered with filter$2.$ Find the coefficients of a single equivalent spatial filter $($mask$)$ for the entire filtering process $($note also what the dimensions of the equivalent filter should be$).$ Write which mathematical operator uses the equivalent filter. Show with an example how the coefficients are calculated.