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(1 point) This question concerns the field GF(16). The modulus is P(x)=x4+x+1. Please answer the following questions about arithmetic in this field. a) If p(x)=x3+x2+x and q(x)=x3+1, what is p(x)+q(x) modulo P ? b) If p(x)=x2 and q(x)=0, what is p(x)+q(x) modulo P ? c) If p(x)=x3+x2+1 and q(x)=x3+x2+x, what is p(x)q(x) modulo P ? d) If p(x)=x3+x2 and q(x)=x+1, what is p(x)q(x) modulo P