c) Let X= {p, q, r, s, t), Y= {1, 23} and Z-{k, e} 1. Define one-to-one function and how many one-to-one function are there from Y to X. 2. Define onto functi on and how many onto functi on are there...

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Extracted text: c) Let X= {p, q, r, s, t), Y= {1, 23} and Z-{k, e} 1. Define one-to-one function and how many one-to-one function are there from Y to X. 2. Define onto functi on and how many onto functi on are there from Y toz.