Briefly explain how total revenue (TR) will be affected in each of the following cases (use the TR formula):

(a) Demand is elastic and price increases by 1%

(b) The price elasticity of demand (Ed)= 0.4 and price increases by 1%

(c) Demand is elastic and price decreases by 1%

(d) Demand is perfectly inelastic (Ed=0) and price decreases by 1%

(e) Demand is inelastic and price decreases by 1%

Don't use chatgpt otherwise I'll down vote so please provide genuine answer.