The following figure shows a$)$ MS$1$ spectrum of aldolase, $50$ ms transient. b$)$ Mirror$-$switching isolation of the tetramer $25+$ charge state, $50$ ms transient. c$)5000$ eV SID spectrum, $4$ ms transient.

$1-1.$ Using the mass spectrum of b$),$ estimate the molar mass of aldolase.

$1-2.$ Using the peaks of $+5,+6,+7,$ and $+8$ on the mass spectrum of c$),$ estimate the m$/$z values of the singly charge fragment ion.

$1-3.$ Using the peak of $+6$ on the mass spectrum of c$),$ estimate the resolving power of the mass spectrometer.