Draw the following FACS graphs based on the information given.

a) A population of blood cells using antibodies against the BCR and the TCR as the detecting antibodies.
b) A population of blood cells from a person suffering from SCID using antibodies against the BCR and the TCR as the detecting antibodies.
c) A population of blood cells using antibodies against CD3 and Igα/β as the detecting antibodies.
d) A sample composed of T cells and macrophages using antibodies against CD4 and CD28 as the detecting antibodies.
e) A sample composed of B cells and macrophages with antibodies against CD40 and MHC class I as the detecting antibodies.