In Sweet Peas, Genes C and P Are Necessary for Colored

Short Answer

In sweet peas, genes C and P are necessary for colored flowers. In the absence of either (__ pp or cc __), or both ( cc pp ), the flowers are white. What will be the color of the offspring of the crosses in what proportions for the following?
(a) Cc Pp x cc pp
(b) Cc Pp x Cc Pp
(c) Cc PP x Cc pp
(d) Cc pp x cc Pp