Required: a. Calculate the materials price varianee and indicate whether it is favorable or unfavorabie b. Calculate the materials usage variance and indicate whether it is favorable or unfavorable. c. Calculate the labour rate variance and indicate whether it is favorable or unfivorable, d. Calculate the labour efficiency variance and indicate whether it is favorable or unfavorable. e. Calculate the variable overhead spending yarianec and maieate whether it is favorable or unfavorable. f. Calculate the variable oyerhead efficiency yarumee and indical whether if is fovorable or unfayorable