Tribal corporation had the following activity that produced differences in book and tax treatment occur

Tribal corporation had the following activity that produced differences in book and tax treatment occur during the year. Classify whether each book tax difference is generally favorable or unfavorable (F or U), temporary or permanent (T or P)
Interest income from municipal bonds
a. Unfavorable, Permanent
b. Unfavorable, Temporary
c. Favorable, Permanent
d. Favorable, Temporary