In the given figure, the intersection of the diagonals is Y.
y= 90∘ (Because the diagonals of a rhombus bisect each other at 90∘)
∠SRT = ∠QSR + y [external angle is equal to sum of opposite interior angle]
152∘ = x + 90∘
thus, x= 62∘
In ΔSPR, SP = SR
∠SRP = ∠SPR = z
∠SRP = 180∘ - 152∘ = 28∘
Thus, z=28∘