1.Use this figure to find the main sequence lifetime of a 5 M star.
2. Use this figure to find the sunspot number at the highest sunspot maximum of the nineteenth century.
Please see attached for all figures.© BrainMass Inc. brainmass.com May 20, 2020, 1:07 pm ad1c9bdddf
From 5 on x-axis draw a line parallel to y axis, where this line meets the graph, ...
The following posting helps with astrophysics problems.