Let f,g:[0,1]R be such that they intersect at (0,0) and (1,1). And let R be the region enclosed by f and g.A. What is the volume of the solid obtained by rotating R about the line y=43?a.201(43-x)(f(x)-g(x))dxb.201(43x)(f(x)-g(x))dxc.01[(43-f(x))2-(43-g(x))2]dxd.01[(43-g(x))2-(43-f(x))2]dxB. What is the volume of the solid obtained by rotating R about the line x=-12?a.201(x12)(f(x)-g(x))dxb.201(x-12)(f(x)-g(x))dxc.01[(g(x)12)2-(f(x)12)2]dxd.01[(f(x)12)2-(g(x)12)2]dxC. What is the volume of the solid obtained by rotating R about the line x=54?a.201(54x)(f(x)-g(x))dxb.201(54-x)(f(x)-g(x))dxc.01[(54-g(x))2-(44-f(x))2]dxd.01[(54-f(x))2-(54-g(x))2]dx