Identify the leading coefficient of each polynomial function. The leading coefficient of a(x)=-8x+3 is square The leading coefficient of b(x)=5x^2+3x-2 is square The leading coefficient of c(x)=-6x^3+8 is square The leading coefficient of d(x)=7x-3+2x^3+x^2 is square The leading coefficient of f(x)=15+x is square

The leading coefficient of is .The leading coefficient of is .The leading coefficient of is .The leading coefficient of is .The leading coefficient of is .