Please answer A and B

a young married couple, have a U$.$S$.$ Federal marginal tax rate of $37\%.$ They consider investing in a municipal bond yielding $3\mathrm{.}15\%.$ Bond price $$ par value. They reside in a State with no State income tax. They are also considering a corporate bond yielding $5\mathrm{.}25\%.$ Both bonds have the same Moody$$s ratings & years to maturity.

A$.$ Determine their $$taxable equivalent yield$$ on the municipal bond. Show all work.

B$.$ Should the couple invest in the municipal bond or corporate bond? Briefly explain.