Ihave to write expressions for these problems but i do not know how writing expressions. write expressions to describe each situation. do not solve. a) lenny budgeted $55 to buy lunch for the next 7 days. if he buys a soda each day for $1.75, how much of his budget does he have left? b) mandy makes a monthly mortgage payment of $850. if she budgeted $11,000 of her salary for mortgage payments this year, what amount of this budget will remain after 12 months? c) tim is washing his car. he has $8.45 in his pocket when he starts washing his car. if he spends 18 quarters to wash his car, how much money does he have left?