It asks to find M o E, but M is a relation from C to D and E is a relation from S to C. It also asks to find M o T^-1 but T^-1 is a relation from P to C. Are these supposed to be asking for E o M and T^-1 o M?
#Am I crazy, or is this question written down wrong?
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It asks to find M o E, but M is a relation from C to D and E is a relation from ...
No, it's not. M o E = M(E).